Physicshard · Past Paper
A stone dropped from the top of a cliff strikes the ground in 4 seconds. How much more time will it take to strike if the cliff was 4 times as high?
A4 s
B8 s
C12 s
D16 s
✓ Correct Answer: A — 4 s
h = 1/2 gt^2. 4h = 1/2 g(T)^2. So T = 2t = 8s. Additional time = 8 - 4 = 4 seconds.
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