Question
Fri October 28, 2011 By:

Find the momentum of a body of mass 100g having a kinetic energy of 20J.

Expert Reply
Sat October 29, 2011

K.E=1/2(mv2)

m=100g=.1kg

k.E=20 J

so, 20=1/2 x0.1xv2

40=0.1xv2

400=v2

V=20m/s

Momentum ,p=mv

So,  p=0.1kg x20 m/s

    =2kgm/s

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