Question

A body of mass 5 kg undergoes a change in speed from 20 m/s to 0.20 m/s. The momentum of the body
would
(1) increase by 99 kg m/s
(2) decrease by 99 kg m/s
(3) increase by 101 kg m/s
(4) decrease by 101 kg m/s​

Answer 1

Answer:

Given,

mass of body = 5kg

Initial velocity, u = 20m/s

Initial momentum, Pi = m×u

= 100kg m/s

Final velocity, v = 0.20m/s

Final momentum, Pf = m×v

= 1kg m/s

Change in momentum = Pf - Pi

= 1 - 100

= -99 kg m/s

Thus, the momentum of body would decrease by 99kg m/s

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Answer 2

Answer:

answer is decrease by 99 kg m/s

it's the correct and right answer

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sahanaa76