Question

Find the momentum of a body of mass 100ghaving a kinetic energy of 20 joule

Answer 1

K.E=1/2(mv2)

m=100g=0.1kg

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