Question

A body of mass 2 kg moving with speed of 5m/s strike a vertical wall and rebound with the same in opposite direction. The change in magnitude of linear momentum of the body is

Answer 1

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momentum = mass X velocity

Pi = 5X2=10

Pf = -(5*2)=-10

change in momentum

(Pf-Pi)= -20kg m / sec

|P| =20 kg m / s

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