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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A body of mass 1000 kg is moving horizontally with a velocity 50 ms⁻¹. A mass of 250 kg is added. Find the final velocity. [OJEE 2008]

Answer: (A)

Solution

By momentum conservation, v = (1000×50)/(1000+250) = 50000/1250 = 40 ms⁻¹.

Question ID VK-152866