Question

Find the momentum of a body of mass100g have kinetic energy 20 j

Answer 1

Mass = 100g = 0.1kg

K.E. = ½(m)(v²)

20 = ½(0.1)(v²)

v² = 400

v = 20m/s

Momentum = mv

P = (0.1)(20)

P = 2 kg.m/s

Answer 2

K.E=p^2/2m

So,20*2*100=p^2

P=√4000