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​

Answer 1

Answer:

Initial speed of the body  u=20 m/s

Final speed of the body  v=0.20 m/s

Thus change in momentum  Δp=m(v−u)

∴ Δp=(5)(0.20−20)=−99 kg m/s

Thus momentum of the body decreases by  99 kg m/s.