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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

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

Answer: (D)

Solution

Initial momentum magnitude = √[(mv)² + (mv)²] = √2·mv = √2(2)(10) = 20√2

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Question ID VK-154128