SAT Subject Physics Practice Question 6: Answer and Explanation

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Question: 6

6. 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. 15 m
B. 20 m
C. 30 m
D. 45 m
E. 60 m

Correct Answer: D


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

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