Question

Find the change in momentum of an object of mass 2kg which slows down from 40km/h to 20km/h.​

Answer 1

m=2 kg

change in momentum=Δp

Δp=pf-pi

pi=2*40

=80

pf=2*20

=40

Δp=40-80

=-40

|Δp|=40

hope this helps