Question

For how long should a force of 100N act on a body of mass 20kg so that it accquires a velocity of 100m/s.​

Answer 1

Answer:

Given,

Force, F = 100 N

Mass of the body, m = 20 kg

Therefore, Acceleration is given by,

Acceleration, a = F/m = 100/20 5m/s^2

Now, Initial velocity, u = 0

Final velocity, v = 100 m/s

Acceleration, a = 5m/s^2

Therefore, Time for which the force is applied,

t = v-u/a = 100 - 0/5

= 20s