Question

A body starting from rest reaches a velocity is brought to a halt by applying a force in the direction opposite to the motion in 4seconds. Calculate the acceleration of the object in these 4 secs.

Answer 1

here as give u = 0  and the velocity become half in 4sec

v= u +at 

v/2 = 0 + a / 4 

2v = a 

acceleration = 2v