A body of mass 5 kg strikes a body of mass 2.5 kg initially at rest, which after the collision begins to move with a kinetic energy of 5J. Assuming the collision to be central and elastic, the K.E. of the first body before impact is
Text Solution
Verified by ExpertsThe correct answer is:
B
Collision is perfectly elastic so both momentum and K.E. are conserved
Therefore, 
KE of the 1st body 
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