A 10-kg rock and 20-kg rock are dropped from the same height and there is no air.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
E)T/4

Question

Quizplus · Accepted Answer

The time it takes for an object to fall to the ground does not depend on its mass, only on the height it is dropped from and the acceleration due to gravity. Therefore, both rocks will take the same amount of time to reach the ground, which is T.

A 10-Kg Rock and 20-Kg Rock Are Dropped from the Same