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