Motion Review Physical Science

1. True or False… Motion is measured relative to a reference point.

TRUE Motion is measured relative to a reference point.

2. True or False… Average speed is the rate at which an object is moving at a given instant.

False Instantaneous speed is the rate at which an object is moving at a given instant.

3. True or False… A meter is a place or object used for comparison to determine if something is in motion.

FALSE A reference point is a place or object used for comparison to determine if something is in motion.

4. True or False… If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same velocity.

FALSE If a toy car traveling at 10 cm/s passes a toy car moving at 10 cm/s in the opposite direction, both cars have the same speed.

5. True or False… A straight diagonal line on a distance vs. time graph indicates constant speed.

TRUE A straight diagonal line on a distance vs. time graph indicates constant speed.

6. True or False… A horizontal line on a distance vs. time graph means that the object is at rest.

TRUE A horizontal line on a distance vs. time graph means that the object is at rest.

7. True or False… A child riding on a merry-go-round is accelerating because his direction is changing.

TRUE A child riding on a merry-go-round is accelerating because his direction is changing.

8. True or False… The SI unit of velocity is the meter per second per second.

FALSE The SI unit of acceleration is the meter per second per second.

9.True or False… A straight line on a graph of speed vs. time means that the object has a constant acceleration.

TRUE A straight line on a graph of speed vs. time means that the object has a constant acceleration.

10. True or False… The steepness of a line graph is referred to as the run.

FALSE The steepness of a line graph is referred to as the slope.

11. A reference point is assumed to be _______, or not moving.

11. A reference point is assumed to be __stationary_____, or not moving.

12. A change in an object’s position relative to a reference point is called _______________.

12. A change in an object’s position relative to a reference point is called ____motion___________.

13. When riding a bicycle past a building, you are not moving relative to the ____________.

13. When riding a bicycle past a building, you are not moving relative to the ___bicycle_________.

14. Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the _____________.

14. Suppose you are sitting in a car at a red light when a car moving toward the north begins to pass you. If you use the passing car as a reference point, the direction in which you appear to be moving is toward the south.

15. The distance traveled by a moving object per unit of time is called ____________________.

15. The distance traveled by a moving object per unit of time is called ______speed_____.

16. The basic SI unit of length is the _________________.

16. The basic SI unit of length is the meter.

17. Speed that does not change is referred to as ____________ speed.

17. Speed that does not change is referred to as constant speed.

18. The statement that the motion of a hurricane is 20 km per hour in an easterly direction is a description of the hurricane’s _______________.

18. The statement that the motion of a hurricane is 20 km per hour in an easterly direction is a description of the hurricane’s velocity.

19. A speed of 15 km per hour is abbreviated as 15 _____

19. A speed of 15 km per hour is abbreviated as 15 km/h.

20. Acceleration is the rate of change in _______________.

20. Acceleration is the rate of change in velocity.