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Question

# Three identical blocks A, B and C are placed on horizontal frictionless surface. The block B and C are at rest, A is approaching towards B with a speed of 10 m/s. Collision between A & B is elastic and between B and C is pure inelastic, then the final speeds of A, B and C are

A
0, 5 m/s, 5 m/s
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B
5 m/s, 5 m/s, 0 m/s
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C
5 m/s, 0, 5 m/s
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D
0 m/s, 0 m/s, 10 m/s
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Solution

## The correct option is A 0, 5 m/s, 5 m/s Given elastic collision between A and B So after collision, VA=0,VB=10m/s Given that collision between B and C is inelastic So B & C will move together with 5 m/s.

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