A body of mass 2 kg is moving with velocity 10 m/s towards east, Another body of same mass and same velocity moving towards north collides with former and coalesces and moves towards north-east. Its velocity is

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10 m/s

5 m/s

2.5 m/s

52 m/s

answer is D.

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Detailed Solution

Applying the law of conservation of momentump2=p12+p22 or (4v)2=(2×10)2+(2×10)2 or v=52m/s

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