You are in a car going 70 km/h and another car passes you going in the opposite direction at 70 km/h. Do both cars have the same velocity? Explain. (3 points)

17. What is the difference between distance and displacement?
(3 points)

18. You push on a crate with a force of 10 N to the right, and your friend pushes on the crate with a force of 25 N to the left. Describe and explain the motion of the crate. (3 points)

19. Two objects that have the same weight are dropped from a tall building. One object is larger and flatter than the other. Explain why the larger object hits the ground last. (3 points)

20. Explain how your teeth work as a wedge.
(3 points)

21. An inventor claims to have built a machine that can produce 120 J of work with an input of 110 J. Would you believe the inventor's claim? Why or why not? (3 points)

22. A comfortable summer day is 77°F. What is this on the Celsius scale? (5 points)

23. Explain how heat is transferred between a hot and a cold object by conduction.

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