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AP EAMCET202422 May 2024Morning ShiftPhysicsRotational MotionActual

A uniform rod of length ' 2 L ' is placed with one end in contact with the earth and is then inclined at an angle to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be

Options

  1. A3 g 2 L
  2. B2 L 3 g
  3. C6 g L
  4. DL g

Correct answer

A. 3 g 2 L

Step-by-step solution

By conservation of energy, Loss in PE = Gain in KE aligned & m g(L ) 1 2 I ^2 & m g L = 1 2 [ 1 3 m(2 L)^2 ] ^2 & = 3 g 2 L aligned

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