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MHT CET202019 Oct 2020Evening ShiftPhysicsRotational MotionActual

Three points masses, each of mass 'm' are placed at the corners of an equilateral triangle of side ^ . The moment of inertia of the system about an axis passing through one of the vertices and parallel to the side joining other two vertices, will be

Options

  1. A3 2 ~m ²
  2. B3 4 ~m ²
  3. C1 2 ~m ²
  4. D1 4 ~m ²

Correct answer

A. 3 2 ~m ²

Step-by-step solution

(D) aligned I &=2 mh ² & ~h = 60^ = 3 2 I &=2 ~m 3 4 ²= 3 2 ~m ² aligned

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