Question

Calculate the kinetic energy of a body of mass 0.1kg and momentum 20 kgm/s

Answer 1

kinetic energy is 1/2 mv^2
momentum is mv
it is given that momentum is 20 kgm/s and mass is 0.1 kg therefore mv = 0.1×v that is 20 hence v is 200 m/s
now putting it in the formula 1/2 ×0.1× (200)^2 and you will get 2000kgm/s^2