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NTA Abhyas JEE Main2020PhysicsLaws of MotionPractice

A body takes time t to reach the bottom of an inclined plane of angle θ with the horizontal. If the plane is made rough, time taken now is 2 t . The coefficient of friction of the rough surface is

Options

  1. A3 4 tan θ
  2. B2 3 tan θ
  3. C1 4 tan θ
  4. D1 2 tan θ

Correct answer

A. 3 4 tan θ

Step-by-step solution

μ = tan θ ( 1 − 1 n 2 ) = tan θ ( 1 − 1 2 2 ) = 3 4 tan θ

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