An object released from rest on another planet requires one second to fall a distance of 6 meters.What is the acceleration in meters per second per second due to gravity on this planet?
A)3
B)6
C)12
D)15
E)none of these

Question

Quizplus · Accepted Answer

The formula for acceleration due to gravity is 
a = 2d / t^2 
where a is acceleration, d is distance fallen and t is time taken. 
Substituting the given values, we get 
a = (2 x 6) / 1^2 = 12 
Therefore, the acceleration due to gravity on this planet is 12 meters per second per second. 
Hence, the correct choice is (C).

An Object Released from Rest on Another Planet Requires One