How much work is needed to be done on a ball of mass 50g to give it a momentum of 5kg m/s?
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Work done=change in kinetic energy
p=momentum=5kgm/s
u=initial velocity=0 m/s
v=final velocity=?
m=mass of body=0.05kg
Since……….work W=1/2mv²-1/2mu²
p=mv
v=5/0.05=100m/s
W=1/2*0.05*100²
W=1/2*500
W=250 joules
p=momentum=5kgm/s
u=initial velocity=0 m/s
v=final velocity=?
m=mass of body=0.05kg
Since……….work W=1/2mv²-1/2mu²
p=mv
v=5/0.05=100m/s
W=1/2*0.05*100²
W=1/2*500
W=250 joules
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