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
E)T/4

Question

Quizplus · Accepted Answer

The acceleration due to gravity is constant for all objects, regardless of their mass. Therefore, both rocks will experience the same acceleration and fall at the same rate. Thus, both rocks will take the same time to reach the ground, which is T.

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