Thursday, October 28, 2010

Examples and Answers

Graphing examples

Interpreting Graphs 1 and drawing a graph from a "story!"

Example of graphing Distance (vs) Time

7th graders demonstrate inertia and motion.

A great review of Acceleration!! (and Newton)

Comments box is open...

Did you get these answers ?


  1. Page 329 Answers (You wrote the Question..Right?)

    1. A change in position with respect to a reference point is
    d. Motion

    2.You do not know an object’s velocity until you know its
    c. Speed and Direction

    3. If you know a car travels 30km in 20 minutes, you can find its
    b. Average speed

    4. Acceleration is a change in speed or
    c. direction

    5.The rate at which velocity changes is called

    6. The distance and object travels per unit of time is called
    speed .

    7. The basic SI unit of length is the meter. True

    8. The SI unit of acceleration is m/s2.

    9. The slope of a speed-versus-time graph represents acceleration. True

    10. Both velocity and acceleration include the direction of an objects motion

  2. Mr.V I built a ramp for my inertia demonstration. Would you like me to bring it into class tomorrow. I already tested my experiment. But I just don't know.


  3. I would LOVE for you to bring in your ramp!!


  4. Mr. V, on page 329, did you want us to support our claim? It didn't say we were to do so on the progress log but I supported my claims anyway...Is that okay?

    Kaitlyn Yellow

  5. I really liked the cartoon videos you put on your website becouse I find those as a more fun way to learn then an actual person speaking. I learned about acceleration and force. I also thought that one website with the math teacher teaching graphs was also helpful for the test this week.

  6. Kaitlyn.... When you support your answers, you need to provide proof or evidence. For some questions it might be a sentence that describes an example or a "reason" for your answer. For questions that require math or calculations.. you may simply show your work detailing HOW you come up with the answer.

    The reason this is important is two-fold. First, when you are correct you have reinforced your understanding. Second, if you are incorrect you have a means to identify your error and improve your understanding.

    Put one(10 in the bonus box.


  7. Zach, These are complex concepts and we really need to look at them from different perspectives and in different ways to develop our understanding. I too like the Eureka cartoons. The good thing about the video instructor is you can rewind and/or pause the demonstrations as often as you need.

    I am glad this helps - tell your friends.

    Put one(1) in the bonus box


  8. Page 330 Answers

    15) Interpreting Graphs. The graph below shows the motion of a remote-control car. During which segment is the car moving the fastest? The slowest? How do you know?

    Answer: The car is moving for the first 4 seconds, it stops for the next 4 seconds, and moves again for the last 4 seconds. It is moving fastest from 0-4 seconds because its slope is creates. It moves at 1 m/s. It is not moving from 4-8 seconds because its slope is zero.

    17) Problem Solving: Two drivers make a 100-km trip. Driver 1 completes the trip in 2 hours. Driver 2 takes 3 hours but stops for an hour halfway. Which driver had a greater average speed? Explain.

    Answer: Because the first driver drove the same distance in less time, the first driver had the greater average speed.

    21) Calculating Acceleration. During a slap shot, a hockey puck takes 0.5 second to reach the goal. It started from rest and reached a final speed of 35 m/s. What is the puck’s average acceleration?

    Acceleration =(final speed–initial speed)÷time

    Acceleration = (35m/s – 0m/s) ÷ 0.5s

    Acceleration = (35m/s) ÷ 0.5s

    Acceleration = 70 m/s2
    (70m per second per second)

    The average acceleration of the hockey puck = 70 m/s2 (70m per second per second)

  9. Hey mr.v the answers help for the book!!! It helped me by seeing if i was right or wrong! Thsnk you!!! Happy Halloween! :)

  10. Mr V.
    Thank you for putting the answers up on the wesite because i didnt get around to checking my answers in class today, and during class there was a very long line of people to get their work graded and towards the end of the class period i joined the line. But then the bell rang and i didnt get a chance for you to grade my work, and i am a part of a car pool so i couldnt stay after school. So what should i do, because i really dont want to get a zero even though i did the work?
    Casey/Blue :D

  11. For the first video how does rolling and sliding friction work i dont really understand it. charles scott green

  12. Casey, you don't have to worry now that you have let me know... You may have an extra day- just be sure you show me next class .. remind me you are FIRST in line!!!

  13. Charles,

    For rolling frictions try this site to start..

    and page 342 in your home text book.

    see if that helps at all - ( we haven't covered that yet.)

  14. Charles oooops! ... put one(1) in the bonus box

  15. Thank you for understanding Mr. V I will have everything done for class tomorrow so it doesnt take up very class time :D!

  16. Dear Mr v,
    I need a regrade on my questionsf from page.329, is it possible that you will grade them tommorrow even if i have signed the progress log. and..........

    i know i am your TA for 7 period but a while ago i asked if i could participate in the fish exp. but i may not be able to get a tub like you showed us is it ok if i borrow one if i cant get a hold of one?


  17. No worries, Kevin regrade is OK and of course you can use one of my containers..( actually I was pretty much counting on you to do so.)

  18. Thank you Mr. V for posting the comments, I couldn't find them anywhere!

    Devery, Yellow

  19. You're welcome Devery! (I'm not certain which specific comments you were looking for.)

  20. I like the cartoons for Acceleration Because It first uses speed and time. how they show the locko motive going 36 km a hour and showing how to the problem for how far to go in 10 secs. I like the motion examples cause they show differnet way of motion a little weird but still helps me understand. Jake yellow

  21. Glad that it helps Jake... acceleration can be just a bit confusing..


    Put one(1) in the box.

  22. Thanks mr.V That friction website really helped. Charles, green

  23. Mr. V thanks for posting the answers by the way when is the quiz?????????????
    Sherlock yellow

  24. Hey Sherlock (lol) More than likely early next week M or T. I want to be sure you have time to prepare.

  25. Mr. V, For the R in the RERUN would this be a good paragraph?

    This experiment was essentially supposed to demonstrate inertia. Inertia is the resistance of any physical object to any change in its state of matter. The main question pushing this experiment was “What is inertia?”. Some terminology words I needed to learn before or during this experiment were: inertia, analyze, synthesize, speed, velocity, acceleration, matter, solid, liquid, gas, plasma, prediction, and hypothesis. This experiment was designed by myself, created by inspiration in class. I determined what the independent, dependent, and control variables were by thinking to myself “What am I changing? What am I not changing?”. The independent variable was what I wasn’t changing, and the dependent variable was what I was changing. Everything else was a control variable.

    Savanah Yellow

  26. Savanah,

    YOU might want to be a bit more specific about the IV and the DV... What were they?

    Other than that .. looks pretty good.

  27. Thank You Mr. V,
    I will be more specific.
    Savanah Yellow

  28. Mr. V in the Bill Nye 7th grader video. What's the rap thing at the end say. I can't figure it out. What is the rolling friction and sliding friction? Are we or have we already learned about it?
    Allie Yellow

  29. Allie , You can find some great information on rolling friction in your Home text book page 342 and 343- we haven't covered that yet.

  30. These are the Q&A's I made to prepare for the Motion and Matter Test:
    1.(Q.:) Scientist uses what to describe the distance an object moves?
    (A.:) SI units.
    2. Physical Properties can be used to classify what?
    (A.:) Matter.
    3. (Q.:) Suppose a cyclist travels 32 kilometers during the first 2 hours. Then the cyclist travels 13 kilometers during the next hour. What is the cyclist's average speed?
    (A.:) Total distance= 32km + 13km =45km
    Total time= 2h + 1h =3h
    Average speed= 45km/3h = 15km/h
    The cyclist's average speed is 15 kilometers per hour.
    4. (Q.:) What refers to increasing speed, decreasing speed, or changing direction?
    (A.:) Acceleration.
    5. (Q.:) An airplane is moving down a runway. The plane's speed started out at 0 m/s, then moved faster to a final speed of 40 m/s in a time of 5 seconds. What is the acceleration of the airplane?
    (A.:) Acceleration= 40m/s-0m/s /5s
    Acceleration= 8m/s (squared).
    Kaitlyn Yellow

  31. Yay , Kaitlyn. You were first to post (there was a small technical glitch in your post, I fixed it.)

    Put one(1) in the bonus box

  32. Mr. V, for some reason my comments aren't showing up on the blog. If you get this let me know. I'm worried that my computer's glitching or you didn't see my comments.

    Sherlock/Savannah Holmes/yellow

  33. Oh wait never mind just found one ( my bad)


  34. Proof that Mikaela Bowman period 6 prepared for her test.
    1. Q:What is the eguation for average speed?
    A:Average Speed = Distance over time

    2. Q:What is the SI unit for lenght?
    3. Q:What is speed?
    A:How fast an object travels per unit of time

    4. Q:A prediction based on data from a repaeted test is a what?

    5. Q:How do you find an objects averge acceleration?
    A: Acceleration = finale speed - initial speed divided by time

  35. Mikaela... check your answer for number 4 please, otherwise..good Q & A!

  36. Questions and Answers I made to help me prepare for the test!!
    1. Q: A falling raindrop accelerates from 10 m/s to 30m/s in 2 seconds. What is the raindrop's average acceleration?

    A: Acceleration= final speed-intial speed divided by time
    Final Speed: 30 m/s
    Intial Speed: 10m/s
    Time: 2 sec.
    Acceleration= 30m/s-10m/s divided by 2s
    Acceleration= 20m/s divided by 2s
    Acceleration= 10m/s (per second per second)
    -The raindrop's average accleration is 10m/s (per second per second)

    2.Q: A change in position with respect to a reference point is____________.

    A: motion

    3.Q:What is the formula used to find the average speed?

    A: Distance divided by the time

    4.Q: You dont know an object's velocity until you know its _____________ and___________.

    A: Speed and Direction

    5.Q: How many centimeters are there in a meter? How many meters are there in a kilometer?
    A: There are 100 centimeters in a meter and there are 1,000 meters in a kilometers.

    Hannah, Green

  37. Hey Mr. V,
    For my question #1 I wasnt to sure if per second per second whats right to put at the end of my anwswer. I didnt know how to make that little 2 on computer, hope that alright://

    Hannah, green

  38. Yes it is second per second... it is called "superscript" on the computer. I will show you

  39. Here are some questions I used to prepare for the motion of matter test on Tuesday.

    1Q. What is the Formula for Average Speed?
    1A. Distance/time EX. A plane traveled 30 miles in 5 minutes.
    30/5= 6 miles per minute

    2Q. How many cm are there in a foot? How many cm are in a meter?
    2A. 100 cm = 1 meter
    30 cm = 1 foot
    3Q. What refers to a change in speed or direction?
    3A. Acceleration

    4Q. What is motion?
    4A. Motion is a change in position with respect to a reference point.

    5Q. What is the formula for average velocity?
    5A. Distance/Time

    6Q. What is velocity?
    6A. Velocity is any distance traveled per a unit of time.

    7Q. What are the most commonly used SI units of measurement?
    7A. Meter, Centimeter, Kilometer, Gram, Kilogram, Second, Newton

    My source: The home Text (Peason Physical Science Book)

    Savanah Yellow

  40. These are some questions I used to study for the test.

    1) Do two objects with the same speed have the same amount of inertia.
    a- No, inertia is a combination of speed and mass.

    2) Will objects of different weight, rolling down a ramp, end up with the same velocity at the bottom.
    a- Yes, gravity is the same for each object.

    3) Name any unit of speed.
    a- distance/ time

    My source was Pearson Physical Science Book

    Paul Sabadish,

  41. questions and answers for the test:

    Q1)what is the definition of inertia?
    A1)the resistance of any object to a change in its state at rest

    Q2)how do you calculate speed?
    A2)distance over time
    resource:your blog

    Q3)how do you find average acceleration?
    A3)acceleratin= finalspeed-initialspeed/time
    resource:your blog

    Q4)what is speed?
    A4)the distance an object travels per unit of time.
    resource:home text book

    Q5)what is acceleration?
    A5)the rate at which velocity changes
    resource:home text book


  42. Paul, three good questions... you might want to consider rewording answer # 3.


  43. Grace I really like that you have used more than one source... a demonstration of mastery effort!

  44. 1. If you know a car travels 45km in 25 minutes, you can find ________.

    A. Average speed.

    2. What is the formula for average speed?

    A. Distance over time.

    3.What is the definition of acceleration?

    A. The rate at which velocity changes.

    4. How do youcalculate acceleration?

    A. Final speed - Initial speed/time

    5. What is the basic SI unit of length?

    A. Meter.

    Source:Prentice Hall, Home text

    Zach H./yellow

  45. Thanks sure to check out the other posts while you are submitting.

  46. Hey gang,

    Don't forget to review graphing and interpreting data... vocabulary and process!

  47. Easy,
    Q Is a Colloid made up of particles? Could they be large like proteins or solid liquid gas?
    A True to both
    Q What is the average speed of a tiger that sprints 200m in 5s?
    A divide 200m by 5s= 40m/s
    Q What is speed?
    A Speed= of an object is the distance of the object travels per unit of time.
    Q How many millimeters are in a meter?
    A 1,000
    Q How many centimeters are there in a meter?
    A 100
    Megan H./Blue

  48. Hi Mr. V, here are my Q's and A's for the test:

    1. A jogger jogged 50 km in an hour and then 25 km the next two hours. What is the average speed the jogger has ran in the past three hours?

    Total Distance: 50km+25km= 75km
    Total Time: 1hr+2hr=3hr
    Average Speed: 75km/3hr=25km/hr
    The average speed of the jogger was 25km/hr.

    Thought of in my mind.

    2. What is the SI unit of length?


    p.311 Science Explorer

    3. How do you find the acceleration of an object's movement?

    Initial Speed: 5m/s
    Final Speed: 43m/s
    Time: 4s
    Acceleration= Final Speed - Initial Speed/ Time
    Acceleration= 43m/s - 5m/s / 4s
    Acceleration= 38m/s / 4s
    Acceleration= 9.5m/s per second

    p.323 Science Explorer

    4. What is the opposite of accelerate?

    The opposite of accelerate is decelerate.

    p.321 Science Explorer in pictures.

    5. What is a reference point? Name an example of one.

    A reference point is a place or object used for comparison to determine if something is in motion. Example: You are in a tree (which doesn't move) and you see a train pass by; the tree is the reference point.

    p.309 Science Explorer

  49. Sorry, those questions are from Tyler/Green

  50. Tyler... VERY WELL DONE!!
    Put one(1) in the box for extra effort on #5

  51. Megan.. way to go! The colloid Q&A are interesting.. What was your source?

  52. What is the defenition of Acceleration?

    Acceleration is the rate of change of velocity as a function of time.


    And also mr.v, there are some things i cannot find in my biography book so i looked it up on the internet, but i cant find it there either. What should i do?

  53. (I'm not sure if my other questions went through)

    How i prepared for the test Tuesday:

    1Q) What is the formula for aceleration?

    A) Acceleration = final speed - initial speed
    source: blog/ notes

    2Q) What is the formula for slope?

    A) Slope = Rise
    source: Home text book/ notes

    3Q) What does acceleration refer to?

    A)Acceleration refers to increasing speed, decreasing speed, or changing direction.

    source: Home text book.

    4Q) What is a change in position with respect to a reference point?

    A) Motion

    source: Notes/ home text book page 329

    5Q) What is the basic SI unit of length?

    A) Meter.

    source: home text book

    sarah valdes/yellow (:

  54. Mr. V,
    My source was my glossary in the field notebook.
    Megan h./Blue

  55. I have a question. I am typing my final final draft of RERUN and I have a quick question about the N Note the Concepts. When it asks, What was the BIG IDEA? How do you know? I don't get the how do you know part. I put the big idea was to see if a ball that bounces higher and weighs less than the other would move farther than the other ball. I dont know how I know this?


  56. 1) There are two Godzilla's traveling to Tokyo to terrorize people. They are both 60km away.Godzilla 1 takes an hour to travel 30km then takes a 30minstop to terrorize nearby villages, then travels for one hour for the last 30km to Tokyo after it destroyed the villages. Godzilla 2 takes an hour to go 40km, Then takes an hour stop to terrorize even more villages; Then takes 20 more minutes to get to Tokyo. Which Godzilla was faster?

    1A) Godzilla 2

    Q2) If King Kong was hanging from two rings attached to a scale and his weight was balanced evenly, How would the scale reading in the supporting ropes compare with his weight? (Making time-distance graphs #II)

    2a) Each rope would equal half his weight on a scale reading.(Conceptional Physics p27 #1)

    Q3) Suppose he hangs with slightly more weight on the left. What would the scales equal?

    A3)It dosen't matter how much or how little weight on one side it will still be the same.(Conceptional Physics p27 #2)

    Q4) What if Godzilla and King Kong hung on to the the scale with one ring for each monster?

    A4) The scale would equal both their weights.You would have to measure them separately to find the individual weight.(Random)

    Q5)Jaws accelerates from 1m/s to 3m/s every time he smells blood in 2 seconds.What is Jaws average acceleration?

    A5)1m/1sec(p323 #1Pearson)

    Sherlock yellow

  57. How the scientist's colleagues, the public, the press, the government, or the funders reacted to the work.

    What specific errors were made.

    Thats about it.

    Devery, Yellow

  58. Questions for Test review:
    1. What is a reference point?
    Place or object used for comparison to determine if something is in motion.

    2. How do you calculate average speed?
    Acceleration = final speed- initial speed
    3. What is velocity?
    Velocity is the speed in a given direction.

    4. What is SI stand for?
    SI stands for International System of Units.

    5. A person can accelerate at from rest to 100 m/s in 10 seconds. Find the average accelerate for the person.
    Initial Speed= 0 m/s
    Final Speed= 100 m/s
    Time= 10 s
    The average acceleration of the person
    Acceleration= Final Speed-Initial Speed

    Acceleration= 100 m/s – 0 m/s
    10 s

    100 m/s =Acceleration
    10 s

    The average acceleration of the person= 10 m/s

    Allie Yellow

  59. my proof that i prepared for the test on tuesday.

    1.)Q: What is speed?
    A: How fast an object moves per unit of time.

    2.)Q: What is the equation for Average speed?
    A: Distance/time

    3.)Q: What is a change in position with respect to a reference point?
    A: Motion

    4.)Q: What is the SI unit for length?
    A: Meter

    5.)Q: When you know both the speed and direction of an object's motion, you know its
    A: Velocity

  60. Q&A for the test:

    Q: which of newtons laws of motion states that objects have a tendancy to resist a change in motion
    A: law of inertia
    resource: home text

    Q: what is the formula for finding speed
    A: speed= distance/time
    resource: home text

    Q: a ball thats rolling down a hill accelerates from 6 m/s to 18 m/s in 12 seconds. what is the average rate at which the ball is accelerating and what formula did you use to find this information
    A: the ball is accelerating at an average rate of 1 meter per second. the formula used was acceleration= final speed-initial speed/time.
    resource: home text


  61. (Q) An arrows initial upward speed is 50m/s, and 5 seconds later it's zero. What's the average speed of the arrow during this time?

    (A) The average speed= 27.5m/second per second.


  62. Define matter.

    Matter is anything that has mass or takes up space.

    Larry, Yellow

  63. Q1.the rate at which velocity changes is what

    Q2.A cahnge in a position to a specific point is what.

    Q3. If your goin to a town 2 and a half hours away and your goin 30 miles a hour how far away is it.

    Jake yellow

  64. Jake, you should also supply the answers.(lol) OOOOPS

  65. Sabrina, check your answer. (Your calculations appear accurate - check your units label)

  66. Lauren, good choice of questions.. especially # 3!

  67. Themi, your source was the home text book? ..right?


  68. My sources are the Physical Science Textbook, HomeText.
    Allie Yellow

  69. Allie, good calculation Q&A its hard to type the "superscript 2" so, in words acceleration would be - meters per second per second-

  70. Sherlock..these are Exceptional Q&A ..exactly what I was looking for !!! Truly a demonstration of mastery effort.
    Pleas put three(3) in the bonus box.

    ps.. Ms V loved them!

  71. Devery, I think I have a source that will help you.
    Check in with me tomorrow.

  72. Tyler... what did your data and graph tell you?

    Was your prediction accurate. if so, then that becomes your hypothesis. If not what is your New Hypothesis.
    Hypo = Big
    Thesis = Idea

  73. Questions and answers i mad to help me prepare for the test:

    1Q: What is the equation for speed?
    A: Speed= Distance over Time

    2Q: What is Acceleration?
    A: The rate at which velocity changes.

    3Q: You do not know an object's velocity until you know its...
    A: SPeed and Direction

    4Q: What is the equation for Acceleration?
    A: Acceleration= Final speed - Initial speed over time.

    5Q: What is the basic SI unit of length?
    A: meter

    6Q: Define slope.
    A: The steepness of a line on a graph is called slope.


  74. sorry I forgot to put where I got the questions from. yes I referenced them from the home text book.

  75. my Q&A for the test.

    Q: How fast an object moves per unit of time..
    A: speed.

    Q:Motion is..
    A: a change in position with respect to a reference point

    Q: What is the SI unit for length is?
    A: Meter

    Q: the formula for speed is?
    A: speed= distance/time

    Q:An ice cream truck is moving along at 20 m/s. It then speeds up for 5 seconds at 8 m/s2. What distance would the truck travel in this time interval?
    acceleration= distance/time
    acceleration=final speed- inital speed/time
    acceleration= 20 m/s - 8 m/s /5 seconds
    accelertaion= 12 m/s / 5 seconds
    acceleration= 2.4 m/s2

    i got all of the questions from the home text and i found the acceleration problem from this website.


  76. question 1

    If a car is traveling 30miles and it takes 2 hours to reach its destination what was the cars speed in mph?

    speed= 30miles
    speed= 15mph 30/2=15

    Mr. V the requirement was only one question correct?
    Thank you


  77. Questions and answers for the test:

    1Q: What is acceleration?
    A: The rate at which velocity changes.

    2Q: Wha is the equation for Acceleration?
    A: Acceleration= Final speed - Initial speed over time.

    3Q: You dont know an object's velocity until you know its
    A: Speed and DIrection

    4Q: Define Motion
    A: The state in which one object's distance from another is changing.

    5Q: If you know the distance an object travels in a certain amount of time, you can calculate the _________ of the object.
    A: Speed

    6Q: What is the basic SI unit of length?
    A: Meter


  78. Greg, Everyone must have one(1) Q&A for class tomorrow. That is NOT considered complete test preparation.


    MR V

  79. Kassandra, good Q&A. and thanks for the website!!

    put one(1) in the bonus box for that!

  80. Jessica, cool , 6 Q&A ! What was your source for definition of slope? It is worded a bit different than I am used to.

  81. Thanks, my source for the definition of slope was the glossary in the back of the science text book.


  82. Wow Jessica another 6? Good work.

    put one(1) in the bonus box!

  83. Thank you!!


  84. Mr.V
    I just got back from Philadelphia and i am so glad you made us put questions and answers on the blog. I couldn't bring my Text Book with me, so what I did, was study notes from my FB and read and answered the various questions on the blog. This is very helpful.

    Paul Sabadish

  85. Questions and Answers for test Tuesday.

    Q: How do you figure out the average speed of an object?
    A: You must divide distance over time.

    Q: What is the SI unit of length?
    A: It's a meter.

    Q: What does hypothesis mean if you break it down?
    A: Well, hypo- means BIG and Thesis means- "thesis" put it together and you get BIG- THESIS.

    Q: What is the name of a famous man who founded out many things, who also was an astronomer and a mathematician?

    Q: How many laws of motion are there? And who created them?
    A: There are only three important laws of motion, and Sir Isaac Newton. Which are called "Newton’s laws of motion!"

    Erin Burke, Blue

  86. Q and A for test

    Q1:What do you need to know when finding velocity?
    A1:Speed and the direction of the object.

    Q2:What is the definition of acceleration?
    A2:Acceleration-is the rate at which velocity changes.

    Q3:What is the formula for speed?

    Q4:What is the formula for acceleration?
    A4:Acceleration=final speed - initial speed/time

    Q5:What kind of measuring units do scientists use to describe the distance an object moves?
    A5:SI units

    All questions and answers found in home textbook.

    By: Ty Hager / green

  87. Q & A, pg. 325, Home txtbook:

    1. Q: What are the three ways that an object can accelerate?
    A: Three ways that an object can accelerate are either by increasing speed, decreasing speed, or changing direction.

    2. Q: Describe how a baseball player accelerates as he runs around the bases after hitting a home run.
    A: A baseball player accelerates by first increasing speed (starting to run), changing direction (running to the bases), and finally decelerating (coming to a dramatic stop at home base).
    3: Q: An ice skater glides around a rink at a constant speed of 2 m/s. Is the skater accelerating? Explain your answer.
    A: The ice skater is accelerating because the skater is changing direction, which is a form of acceleration.
    4: Q: What is the formula used to calculate the acceleration of an object moving in a straight line?
    A: The proper formula for measuring acceleration in a straight line is Final Speed - Initial Speed over time.
    5: Q: A cyclist's speed changes from 0 m/s to 15 m/s in 10 seconds. What is the cyclist's average acceleration?
    A: The cyclist's average speed is 1.5 m/s2.

    -Justin, Blue

    P.S. Thanks! Don't know what i'd do without this blog.

  88. Zach L /yellow

    What is the rate at which velocity changes.

    How do you calculate average speed
    distance traveld divided by time = average speed

    What is the definition velocity
    speed in a given direction.

    What is the definition for speed.
    The distance an object travel per unit of time.

  89. Questions and Answers for Tuesday's test...

    Q#1 What is Newton's first law also commonly known as?
    A: Inertia

    Q#2 What two things is it necessary to know to find an object's velocity?
    A: Its direction and its speed

    Q#3 What is the steepness of a line on a graph called?
    A: Slope

    Q#4 To find the slope of a line you must divide what two things?
    A: Its rise by the run.

    Q#5 Acceleration refers to what three things?
    A: Increasing speed, Decreasing speed, or a change in the object's direction.

    Q#6 What does SI units stand for?
    A: International System of Units

    Q#7 What is the SI unit for length?

    Q#8 Define a reference point.
    A: A place or object used to compare two or more objects to find if something is in motion.

    Q#9 If there is a straight line on a graph that means that the object is doing what?
    A: Npt moving

    Q#10 What is instanataneous speed?
    A: The speed of an object at one instant of time.

    Q#11 True or False. The formula for acceleration is Initial Speed - Fianal Speed, over time.
    A: False it is Final speed - Initial speed, over time.

    Q#12 Is this, m/s2, the SI unit for acceleration, or velocity?
    A: Acceleration

    Q# 13 What are the four states of matter?
    A: Solid, Liquid, Gas, Plasma


  90. Mr. V,
    In class there wasen't enouph time for you to check my rerun. Can you grade it tommrow?
    Megan/ Blue

  91. Mr. V, I have an important question to ask you..

    How can I get mastery on all of my RERUN??? I've heard that people are getting masteries for them and i was just saying I worked very hard on them and I deserved a mastery on atleast some of them.



  92. That's a good question Tyler. When you check the back of your progress log, you see that it says Mastery exceeds expectations...if you hae done MORE than what is expected present it to me and we can reassess with no problem.

  93. 5 Test Questions!
    Direction: If the answer is true the write true if wrong then fix and put the right answer.
    1. True or False
    Inertia depends on matter.
    2. True or False
    The formula for Density is Mass
    3. True or False
    Is slope Rise
    Define the word:
    4. What is speed?

    5. What is motion?

    1. False inertia depends on mass.
    2. True.
    3. True.
    4. Speed is Distance
    5. Motion is the state in which one object is distance from another is changing.
    I used the home textbook.
    Person: Prentice Hall Physical science book.
    BY: Janki-Blue!

  94. Mr v is it ok if i print ou all the questions and answers from your blog and study them tonight as my proof of studying for the assesment.

    Kevin, Blue

  95. Hey mr v can you try to coment back today cause i made my graph eirler in the week but iv just noticed something. If there were more than one times cause in class there were 3 timers and so i have 3 diferant times for each one. how would i make them so i could put them one my graph.... thanks.. Charles, green

  96. You could plot the average for each trial/test if that helps.

  97. Kevin, that's okay I guess, but HOW will you study them? Just reading over them isn't very active study.

  98. Q&A


    Define each term.

    1.What is friction?

    2.What is acceleration?

    3.What is sliding friction?

    Choose the best answer.

    4.You don't know an object's velocity until you know its...

    a)Speed and Distance.
    b)Reference Point.
    c)Speed and Direction.

    5.Acceleration is a change in speed or...



    1.The force that two surfaces exert on each other when they rub against each other is called friction.

    2.Acceleration is the rate at which velocity changes.

    3.Sliding friction is friction that occurs when one solid surface slides over another.

    4.a)Speed and Direction.



  99. Are we still doing are scientist eurka moment presentation on wedsday ... thanks jake yellow

  100. just have to have read your book by then. We will be preparing our presentations starting on Thursday!

  101. ok thanks is the test going to take tuesday and wedsday? jake yellow

  102. Mr.V we are preseting on Thursday! I thought you said you were going to tell us when we had to be ready. I never heard you say that our prestentation is on Thursday.
    Allie Yellow

  103. 1. What is a mixture?
    Two or more substances that are mixed together but are not chemically combined.
    2. What is a solution?
    A well-mixed mixture containing a solvent and at least one solute that has the same properties throughout.
    3.What is the formula for acceleration?
    acceleration=final speed-initial speed
    4.What does acceleration describe?
    The rate at which velocity changes.
    5. What is velocity?
    Speed in a given direction

    Thanks Mr. V

  104. Allie.. I said

    "We will be preparing our presentations starting on Thursday!"


    silly goose

  105. Hi Mr. V i was absent today and I was just wondering if there was alot of progress made today in class for the test. I also have to ask you I made flashcards (78 of them and had 5 sources) and typed a report. What do u think can b a way for me to present that? I'm so clueless...
    I got hit in the head today with a big piece of wood during the lockdown and might have a concussion... Idk what to do??


  106. Can I come to your room tomorrow morning and show u my final final fraft of RERUN for a better grade? Thanks


  107. 1. what is the formula for speed
    answer. speed= distance divided by time.

    2.what is the fomula for acceleration
    answer. acceleration= net force divided by mass.

    3.according to inertia if an object is at rest does it want to stay at rest?
    answer. that is true if an object is at rest it wants to stay at rest.

    4.during acceleration do objects only speed up?
    answer. No acceleration can have a positive and negative affect.

    5.what formula would you need to solve for billy runs 5 miles and it took him 10 minutes. Find billys speed.
    answer. it gives you billys distance and time so you could find his speed.


  108. Hey Dalton... good questions, I can tell you gave them some thought!!

    Put one(1) in the bonus box!

  109. Wow Tyler !! 78 flash cards???? Amazing. I think that represents Mastery effort for SURE!

    Don't worry about your rough draft.. just show it to me when you come back and we can work it out. It is the Final draft that will make the difference.

    Most important out for wild pieces of wood .. they can come out of nowehere!

  110. Yes thanks... but i dont know how i could present that cause it wood take me forever to read 78 cards.
    And I had already done my final draft typed and you gave everything a 4 and the N a 3. I am so confused???!!?!?

  111. Also the reason why I had 78 notecards is because I had I think 6 sources (some from the internet) and I have no idea why but I was in such a hurry to write them last night because I thought they were due today that i wrote so messy and not how I write usually it is freakky. And I think the wooden object used inertia to hit me on the head because i was just sitting in the corner and it was standing perfectly straight up and it just fell like a ghost pushed it or something. It had to hit me though... and I think inertia hates me......


  112. The 4 were satisfactory work you met the expectations.. The 3 on Note the Concepts
    was progresing because you had yet to explain "How" your experiment demonstrated the BIG IDEA...
    Your demonstration of inertia.

    (ps. inertia is our friend)

  113. Hey Mr. V,
    I was wondering what is the due date for the scientist project. In my agenda is says that it was suppose to be due today the 10th, but it seems like it was changed to a different date.


  114. YOU were to have read your biography and come up with and "how and what" you will present about your scientists 'Eureka moment...yes or no' and some what/how questions you might want to answer in your presentation by Nov 10

    Your class presentation is due before the end of the term.

    (don't wait till the last minute... you don't want to run out of time)

  115. Mr.V
    with out eureka moment do we have to do a report or can we do a poster? also in the project do we have to write a summary on our book?

  116. ohhh okay! thank you


  117. Mikaela, you can present your Eureka moment any way you want.
    Paper/poster/skit/speech/ powerpoint ... You will have to present something to the whole class, if you write a paper, you will need to explain parts of it - The Euerka moment yes /or no for example.

    Its really up to you - depends on your scientist I guess!

  118. okay thanks


  119. I didn't really find a eureka moment in the book I read. What would I do my presentation on? His life?


  120. Hunter, If you don't think your scientist had a Eureka moment, explain and present..

    ...what makes you think that and your scientist DID achieve their discovery(s)
    (Read the Blog entry and hand out on EUREKA moments again - it should give you some guidance.

  121. Those videos helped me understand inertia and acceleration. That link was very helpful.

  122. I thought they might.. put two (2) in the box

  123. The videos helped me understand how to interpret graphs more . Thank you ! (:

    - Lindsey, Green

  124. That's the point ... glad it helped. Put two (2) in the box

  125. Very interesting videos.. thanks Mr. V!


  126. Hey Mr.V those videos helped me understand Distance vs. Time and more about Motion.

  127. Janki, that's a good thing, was there anything in particular that helped?

    (+1 in the bonus box)

  128. Hey Mr. V,
    The Interpreting Graphs videos are going to help me a lot on understanding how to read and create a graph for my experiment data.

  129. Thank You. This Article really does help to review info.
    -Justin, Blue

  130. This was a great review of acceleration and the interpreting graphs really helped me create a graph for my experiment.

    -sarah valdes period 4

  131. zach/yellow

    It takes time for an object to reach its max speed and you need to be careful when interpreting graphs because they may seem easy but there really not. I watched the videos and read the info for review.

  132. Thank you Mr. V. Those videos gave me a good review on interpreting graphs,inertia and acceleration.


  133. That seventh grader in that bill nye video is very interesting. He seems to take real interest in newtons laws and friction. thats cool.


  134. Mr. V
    Not really understanding all the U=F+T in the Workbook sheet 49 on this weeks progress log as Wave problems. When I work them they arent needed...
    Alex S

  135. The videos on acceleration and interpreting graphs are good help and great reviw

    Zach H./yellow