Question

How much work is needed to be done on a ball of mass 50gm to give a momentum of 500gm cms/1 ​

Answer 1

Answer:

Momentum = 500gcm/sec=500/(100×1000)=5/1000Kgm/sec.

Mass=50g=1/20Kg

K.E=p

2 /2m.

K.E=(5/1000)

2/(1/10)

K.E=25×10

−5 J.

Hence kinetic energy is 25×10

−5 J.