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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 m/s. A mass of 250 kg is added. Find the final velocity.

Answer: (A)

Solution

Horizontal momentum is conserved (the added mass contributes no horizontal momentum): 1000 × 50 = (1000+250) × v ⟹ v = 50000/1250 = 40 m/s.

Question ID VK-153274