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JEE Main2005PhysicsLaws of MotionActual

A smooth block is released at rest on a 45^ incline and then slides a distance d. The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

Options

  1. A_ k =1- 1 n ^2
  2. B_ k = 1- 1 n ^2
  3. C_s=1- 1 n^2
  4. D_s= 1- 1 n^2

Correct answer

A. _ k =1- 1 n ^2

Step-by-step solution

d = 1 2 g 2 t ₁^2 ~d = 1 2 g 2 (1- _ k ) t ₂^2 t ₂^2 t ₁^2 = n ^2= 1 1- _ k

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