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Forces and Motion Experiment
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Name:Date:
Forces and Motion Experiment
A toy car rolls down a short ramp and across different surfaces. Read the results, then investigate how friction affects its motion. A smaller time means the car travelled faster.
Results from three trials
The car travelled the same distance each time. The times are in seconds.
Surface
Trial 1 (s)
Trial 2 (s)
Trial 3 (s)
Wood
3
3
4
Carpet
6
5
6
Sandpaper
7
8
7
Tile
2
3
2
1.Which surface had the fastest car run? Use the results to explain how you know.
2.Which surface had the slowest car run? What in the results helped you decide?
3.Circle the best explanation: Why might the car move more slowly on carpet than on tile?
- Carpet has more friction pushing against the moving car.
- Carpet makes the car heavier.
- Tile pulls the car forwards.
4.True or false? Friction can slow a moving object down.
TrueFalse
5.The car took 3 seconds, 3 seconds and 4 seconds on wood. What is the total time for those three trials?
6.Choose one thing the experimenters should keep the same each time so the test is fair.
- The ramp height and the distance travelled
- The type of surface
- The time shown on the stopwatch
7.Why is it useful to test each surface three times instead of only once?
8.Complete the sentence: A force is a push or a that can change how an object moves.
9.Imagine the car rolls from tile onto carpet. Describe what you predict will happen to its motion and name the force that helps explain your prediction.
Draw a toy car moving across carpet. Add an arrow to show the direction the car moves and an arrow pointing the opposite way to show friction.
3 printable pages
Page 1
Page 2
Page 3
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