AP Physics 1 Question 439: Answer and Explanation

Test Information

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Question: 439

7. Question below refers to the following scenario:

A 2 kg ball with a velocity of -20 m/s collides with the wall and bounces back with a velocity of 10 m/s.

How much work did the wall do on the ball?

  • A. -300 J
  • B. -400 J
  • C. -750 J
  • D. -1,000 J

Correct Answer: A

Explanation:

A

The work done can be calculated using the Work-Energy Theorem: