At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 15.0 m/s. How much later should he drop a second rock from rest so both rocks arrive simultaneously at the bottom of the cliff?
a. 8.08 s
b. 3.31 s
c. 5.02 s
d. 1.78 s
e. 0.89 s
d
Physics & Space Science
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