A cricket ball of mass 0.4 kg. is moving with a velocity of 40 m/s. Find its kinetic energy
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If a ball of mass 0.4 kg moving with a velocity of 3 ms^-1 collides elastically with another ball of mass 0.6 kg which is at rest,
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ke=0.5 mv× v
=0.5×0.4×40×40
32000/100
=320 kgm/s
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