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Standard IX

Physics

Second Law of Motion

A perfectly e...

Question

A perfectly elastic ball $P_{1}$ of mass m moving with velocity v collides elastically with three exactly similar balls $P_{2}, P_{3}, P_{4}$ lying on a smooth table as shown. Velocities of the four balls after the collision are

v,v,v,v

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0,2v,3v,4v

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0,0,0,v

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0,0,0,0

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Solution

The correct option is C
0,0,0,v

In elastic collision, when identical bodies collide, exchange of velocities take place.

Hence final answer after all the collision would be 0,0,0,v

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A perfectly elastic ball P1 of mass m moving with velocity v collides elastically with three exactly similar balls P2,P3,P4 lying on a smooth table as shown. Velocities of the four balls after the collision are

The correct option is C 0,0,0,v In elastic collision, when identical bodies collide, exchange of velocities take place. Hence final answer after all the collision would be 0,0,0,v

A perfectly elastic ball $P_{1}$ of mass m moving with velocity v collides elastically with three exactly similar balls $P_{2}, P_{3}, P_{4}$ lying on a smooth table as shown. Velocities of the four balls after the collision are

The correct option is C
0,0,0,v

In elastic collision, when identical bodies collide, exchange of velocities take place.

Hence final answer after all the collision would be 0,0,0,v