Question

For how long should a force of 200N at on a stationary body of 20kg so that it acuires a velocity of 100mper second

Answer 1

So acceleration of the body can be calculated as:

F = ma

F = 200 N and m = 20 kg

a = 200/20 = 10 m/s2

Since, the force is acting constantly over the body, the acceleration is uniform; the equations of motion can be applied:

v = u + at

Where v = 200 m/sec, a = 10 m/s2 and u = 0 (rest).

t = v/a = 200/20 =10 sec