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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A 2 kg mass starts from rest on an inclined smooth surface with inclination 30° and length 2 m. How much will it travel before coming to rest on a frictional surface with frictional coefficient of 0.25

Answer: (A)

Solution

Speed at the bottom of the smooth incline: v² = 2g sinθ × L = 2×10×0.5×2 = 20 m²/s². On the rough horizontal

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Question ID VK-153477