Question

By how much does the momentum of a body of mass 5kg change when its speed decreases from 20m/s to 0.20m/s

Answer 1

Explanation:

we know that

change in momentum = final momentum – initial momentum

so,

change in momentum = mv- mu

or

= 5×0.2 – 5×20

or

= 1 – 100

thus,

Δp = – 99 kg.m/s2

Answer 2

Answer:

p=mv-mu

=(5*0.2)-(5*20)

=1-100

=-99kg.m/k^2(Answer)

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