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Q.

A perfectly elastic ball P1 of mass m moving with velocity v collides elastically with three exactly similar balls lying on a smooth table. Velocities of the four balls after collisions are

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a

v, v ,v, v

b

0, 2v, 3v, 4v

c

0, 0, 0, v

d

0,0,0,0

answer is C.

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Detailed Solution

0, 0, 0, v velocity of ball 1 will be given finally to the fourth ball the remaining all balls comes to rest velocities are exchanged in every collision
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