An object of mass 2 kg is moving with a velocity of 4 m/sec. Another object of mass 3 kg is moving with velocity of 3 m/sec. Calculate the ratio of their Kinetic Energies.
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For this problem, note that v2=0 and use conservation of momentum. Thus, p1 = p′1 + p′2 or m1v1=m1v′1+m2v′2. v'2=m1m2(v1−v'1) v ′ 2 = m 1 m 2 ( v 1 − v ′ 1 ) .
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