A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration a , what is the acceleration of the 20-kg rock?
A) 4a
B) 2a
C) a/4
D) a/2
E) a

Question

A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration  a , what is the acceleration of the 20-kg rock?
A)  4a 
B)  2a 
C)  a/4 
D)  a/2 
E)  a

Quizplus · Accepted Answer

Both rocks experience the same acceleration due to gravity, regardless of their mass, assuming no significant air resistance.

A 10-Kg Rock and a 20-Kg Rock Are Dropped at the Same