Question

calculate the he change in momentum of a body of mass 5 kg when it's speed decrease from 20m/sec. to 0.2m/sec.

Answer 1

hello here is your answer
here mass= 5kg and
initial velocity i.e u= 20m/s.
v= 0.2 m/s

change of momentum= mv- mu
so,
5(20) -5(0.2)
100- 1
= 99 kgm/s

hope it helps!!

Answer 2

Given,

The mass of the body = 5 kg

Initial velocity of the body = 20 m/s

Final velocity of the body = 0.2 m/s

Change in velocity = 20m/s - 0.2m/s = 19.8 m/s

Change in momentum = Mass of the body × Change in Velocity of the body

= 5 kg × 19.8m/s

= 99 kg m/s