Question

A particle of mass 100 g accelerates from rest to speed
200 m s-! How much is the change in its momentum?
If this momentum changes in 0.2 second what is force
on the particle

Answer 1

Change in momentum = mv-mu = 0.1kg × 200 = 20 kgm/s

Force = Momentum / Time = 20/0.2 = 100N

Answer 2

P = m(v-u)/t

P = 0.1*200/0.2

P = 100newton

0.1 is because mass of 100 gram is convert in kg