Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

Question

Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m s to 0.20 m s.

Philoid · Accepted Answer

The formula of change in momentum= mv - mu,

Where m=mass i.e. 5kg

v=final velocity i.e. 0.2 m/s

u=initial velocity i.e. 20m/s

Hence, change in Momentum= mv - mu

= 5 (0.2 - 20)

= 5(-19.8)

= -99 kg m/s

99 kg m/s decreases