Physics - Chapter 2 Study Guide

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1. What is the speed of an object at rest?

2. What is the formula for average velocity?

3. What must you have for a complete description of the average velocity of an object?

4. What is acceleration?

5. What units are used to measure free fall?

6. If two items of different weights were dropped from the same height in a vacuum, which would hit the ground first?

7. What is the formula for acceleration?

8. What happens to a car if its velocity is positive and its acceleration is negative?

9. What is the value for the acceleration of an object in free fall?

10. What is another name for acceleration due to gravity?

11. If you throw an object straight up into the air, what do you know about the object when it reaches its highest point?

12. What happens to falling objects of different masses in terms of displacement and acceleration if we ignore air resistance?

13. What happens to an object as it falls towards earth?

14. Draw a velocity-time graph that represents constant acceleration .

15. Draw a velocity-time graph that represents acceleration that varies from one time period to the next.

16. An object is dropped from a 25.5 m building. If air resistance is ignored, what is the speed of the object as it hits the ground?

17. A truck accelerates from 0 m/s to 22.0 m/s with a displacement of 52.0 m. What is the truck's acceleration?

18. A ball is thrown straight upward with an initial velocity of 15.3 m/s. What time interval elapses between the ball's being thrown and its return to the original launch point?

19. A child's toy is thrown from the top of a cliff with an initial speed of 9.8 m/s. If the toy hits the ground after 1.9 s, what is the height of the cliff?

20. A child on a bicycle accelerates at a constant rate from rest to a speed of 12.7 m/s in 4.00 s.  What is the displacement of the child on the bicycle in this time interval?

21. A motorcycle with an initial velocity of 12.8 m/s undergoes a constant acceleration of  2.5 m/s2. What is the magnitude of the motorcycle's displacement after the first 3.0 s of its motion?

22. An object is given an initial velcoity of 6.7 m/s and experiences a constant acceleration of  3.2 m/s2. What is the final velocity after 5.0 s?

23. What is the average velocity for line B in the graph to the right?