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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A body of mass m₁, moving with a velocity 3 ms⁻¹, collides with another body at rest of mass m₂. After collision the velocities of the two bodies are 2 ms⁻¹ and 5 ms⁻¹ respectively, along the direction of motion of m₁. The ratio m₁/m₂ is

Answer: (B)

Solution

v₁ = [(m₁−m₂)/(m₁+m₂)]u₁ and v₂ = [2m₁/(m₁+m₂)]u₁, so v₁/v₂ = (m₁−m₂)/(2m₁).

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Question ID VK-154067