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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A rubber ball is dropped from a height of 5 m on a planet where the acceleration due to gravity is not known. On bouncing, it rises to 1.8 m. The ball loses its velocity on bouncing by a factor of

Answer: (B)

Solution

v₁ = √(2gh₁) = √(10g), v₂ = √(2gh₂) = √(3.6g). Fractional loss in velocity

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Question ID VK-153617