Question: A 1 0 - kg rock and 2 0 - kg rock are dropped from the same height and experience no significant air resistance. If

A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air
resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg
rock to reach the ground?
A)4T
B)2T
C) T
D) T/2

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