AP Physics 1 Question 432: Answer and Explanation

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Question: 432

10. A worker moves a 30 kg box by pulling on it with a rope that makes a 60° angle with the horizontal. If the worker applies a force of 40 N and pulls the box over a distance of 20 m, how much work did the worker do?

  • A. 100 J
  • B. 200 J
  • C. 400 J
  • D. 800 J

Correct Answer: C

Explanation:

C

The work done can be calculated as follows:

W = Fd cosθ = 40 N · 20 m · cos60° = 400 J