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NTA Abhyas JEE Main2020PhysicsRotational MotionPractice

Two uniform rods of equal length but different masses are rigidly joint to form an L-shaped body, which is then pivoted as shown. If in equilibrium, the body is in the shown configuration, ratio M m will be

Options

  1. A2
  2. B3
  3. C2
  4. D3

Correct answer

D. 3

Step-by-step solution

Net torque about O should be zero. Hence mg l 2 sin 60° = Mg l 2 sin 30° ∴ M m = sin 60° sin 30° = 3

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