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Q.

A body of mass 1 kg makes an elastic collision with another body at rest and continues to move in the original direction after collision with a velocity equal to 15th of its original velocity. Find the mass of the second body.

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a

23kg

b

32kg

c

52kg

d

25kg

answer is A.

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Detailed Solution

V1=m1-m2m1+m2u1 u15=1-m21+m2u1 5-5m2=1+m2 6m2=4 m2=23kg

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A body of mass 1 kg makes an elastic collision with another body at rest and continues to move in the original direction after collision with a velocity equal to 15th of its original velocity. Find the mass of the second body.