Question

A force acts for 0.1s on a body of mass 2.0 kg initially at rest . The force is then withdrawn and the body moves with a velocity of 2 m/s. Find the magnitude of force.

Answer 1

t=0.1s
m=2kg
u=0
V=2m/s

i.acceleration=v-u/t
=2-0/0.1
=20m/s^2
ii.force=m*a
=2*20
=40 N