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IAT IISER2020PhysicsLaws of Motion

Consider a solid rod of mass m and uniform density resting against a vertical wall and horizontal floor as shown in the figure. The coefficients of friction of the rod with the wall and with the floor are given to be ₁ and ₂ respectively. Gravity is acting downwards with acceleration due to gravity g . What should be the value of the inclination angle so that the rod stays in equilibrium?

Options

  1. A⁻¹ ( 1- ₂ 2 ₁ ₂ )
  2. B⁻¹ ( ₂ ₁ )
  3. C⁻¹ ( 1- ₁ ₂ 2 ₂ )
  4. D⁻¹ ( ₁ ₂ )

Correct answer

C. ⁻¹ ( 1- ₁ ₂ 2 ₂ )

Step-by-step solution

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