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JEE Main Physics question

PhysicsLaws of MotionJEE Main

A coin of mass 10 kg is placed over a book of length 50 cm. The coin is on the verge of sliding when one end of the book is lifted 10 cm up. The coefficient of static friction between the book and the coin is

Answer: (D)

Solution

The book is tilted so that sinθ = height/length = 10/50 = 0.2. At the verge of sliding,

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Question ID VK-153492