Question

Find the momentum of a body of mass 100g having a kinetic energy of 20j​

Answer 1

Answer: 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

 

Answer 2

the momentum is 2 kg.m/s