AP Physics 1 Question 194: Answer and Explanation

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Question: 194

4. A rock is dropped off a cliff and strikes the ground with an impact velocity of 30 m/s. How high was the cliff?

  • A. 20 m
  • B. 30 m
  • C. 45 m
  • D. 60 m

Correct Answer: C



Use Big Five #5 with v0 = 0 (calling down the positive direction):