Making A Low Friction Balloon Air Puck S5 - PowerPoint PPT Presentation

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Making A Low Friction Balloon Air Puck S5

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Masking tape or chalk or movable place-markers. meter ... Duct Tape. Masking Tape. Paper Clips. Zip Lock Quart Size. 29. That's all Folks. 30. Force and Motion ... – PowerPoint PPT presentation

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Title: Making A Low Friction Balloon Air Puck S5


1
Making A Low Friction Balloon Air PuckS-5
  • Created for OP
  • 3 October 2K3

2
FORCES MOTIONIVA1ROLLING ON AN INCLINED PLANE
  • Created for OP
  • 26 April 2K2

3
  • Materials
  • Inclined plane
  • Free-wheeling toy car
  • Masking tape or chalk or movable place-markers
  • meter stick
  • stop watch

4
  • 1. Adjust the inclined plane so it takes the car
    at least three seconds to reach the bottom. Try
    for four or five seconds.

5
  • 2. A timekeeper will call out seconds. Release
    the car at the top of the incline at one of the
    seconds.

6
  • 3. Every time the timekeeper calls out another
    second, mark the incline to show where the car
    was at that second.

7
  • Measure the distance between the marks to find
    out how far the ball rolled during each second.
  • Record your measurements in the data table below.

8
Distance (in cm) Car Traveled During One Second
  • Trial 1st 2nd 3rd 4th 5th
  • 1
  • 2
  • 3
  • Ave

9
  • 5. Calculate the average velocity for each of the
    time intervals. Use the average distance from
    above. (The elapsed time is always one second.)

10
Table of Results
  • Time Interval Average Velocity
  • (sec) (cm/sec)
  • 1st
  • 2nd
  • 3rd
  • 4th
  • 5th

11
  • 6. What happened to the average velocity of the
    car as it rolled down the incline?

12
  • 7. How much did the average velocity change
    between the first and second time interval?

13
  • 8. How much did the average velocity change
    between the second and third time interval?

14
  • 9. How much did the average velocity change
    between the third and fourth time interval (if
    you got this data)?

15
  • 10. How much did the average velocity change
    between the fourth and fifth time interval (if
    you got this data)?

16
  • 11. Did the average velocity change by about the
    same amount with every passing second?
  • Give the value.

17
  • 12. Your answer to number 11 is called the rate
    of change of velocity.
  • It is the change in velocity divided by the
    elapsed time.

18
  • Its units are the units of velocity divided by
    the unit of Time
  • (usually meters per second divided by seconds or
    centimeters per second divided by seconds
  • we would say "meters per second per second").

19
  • The rate of change of velocity is called the
    acceleration. Use your answer to number 11 and
    write out, with units, the average acceleration
    of the car as it rolled down the incline.

20
  • 13. When you set up the inclined plane, what do
    you think the acceleration of the car would have
    been if the end of the incline had been lifted
    twice as high?

21
  • 14. If the end of the incline had been lifted
    twice as high, what would you predict for the
    average speed during each of the time intervals?

22
  • 15. Repeat the experiment using twice the height
    for the elevated end of the incline.

23
  • 16. Discuss how well your new data matched your
    predictions. Include comments about the efforts
    of some other teams.

24
  • 17. For your first set of data, if the car could
    continue accelerating on the same incline for 10
    seconds, what would you predict for its average
    velocity during the tenth second?

25
  • The acceleration of gravity on Earth is 9.8
    meters per second per second. If a rock is
    dropped from a sufficient height, how fast will
    it be going after
  • 1 sec___ 2 sec___ 3 sec___

26
Thats all Folks
27
Making A Trusty AccelerometerS-7
  • Created for OP
  • 26 April 2K2

28
  • Materials
  • Cardboard
  • Duct Tape
  • Masking Tape
  • Paper Clips
  • Zip Lock Quart Size

29
Thats all Folks
30
Force and Motion4A3Classifying Motionp 69
  • Created for OP
  • 26 April 2K2

31
Predict
  • Accelerated or not?
  • Not moving?
  • Speeding Up?
  • Constant speed, st. line?
  • Slowing down?
  • Changing Direction?

32
  • Cart and Accelerometer
  • At Rest
  • Long Slow Push
  • Constant Speed
  • Slowing down

33
Repeat Be More Aggressive
  • Cart and Accelerometer
  • At Rest
  • Long Slow Push
  • Constant Speed
  • Slowing down

34
Repeat Be More Aggressive
  • What does the trusty accelerometer demonstrate?
  • How does it display the direction of
    acceleration?

35
Cart on Incline
  • Going down the incline
  • Going up the incline
  • Going Up and Down incline

36
Cart on Incline
  • What is the direction of the acceleration of a
    cart on a ramp?
  • a. Going down?
  • b. Going up?
  • c. At the top?

37
What is the trusty accelerometer telling us?
  • a. To right, speeding up
  • b. To right, slow down
  • c. To right, constant speed
  • d. The repeat, to left?
  • e. At the top of ramp?

38
Cart on Incline
  • 15.

39
Cart on Incline
  • 16.

40
Cart on Incline
  • 17.

41
Thats all Folks
42
Force and Motion4B1Acceleration InCircular
Motion72
  • Created for OP
  • 26 April 2K2

43
  • Rotate on stool with trusty indicator
    perpendicular to arm.

44
  • 2. Rotate on stool with trusty indicator
    parallel to arm with arm outstretched.

45
  • 3. Rotate on stool with trusty indicator
    parallel to arm but close to body.

46
  • Show large accelerometer

47
  • 4. When an object is moving in a circle at
    constant speed, what is the direction of
    acceleration?

48
  • Does the acceleration depend on how far from the
    center it is measured?
  • Demo Multi-Accelerometer

49
  • 6. What does trusty accelerometer say when it
    is placed on top of ones head.

50
  • 7. Twist trusty accelerometer using strings.

51
Thats all Folks
52
Force and Motion4B2Acceleration When Speed and
Direction Change75
  • Created for OP
  • 26 April 2K2

53
  • 1. Trusty indicator suspended by strings.

54
  • 1. Trusty indicator supported between 2 springs.

55
Thats all Folks
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