Question

A ball starts moving with an acceleration of 4 m/secsquare. Find out its speed after 4 seconds.

Answer 1

Velocity will vary linearly , by definition of acceleration;a = change in velocity / time

Or we can say ; change in velocity = acceleration× time

Final velocity - initial velocity = 4×4=16 m/s

( Since ball start with an acceleration of 4m/s2 , so initial velocity is assumed zero )

Final velocity= 16 m/s

Speed after 4 second will be 16m/s