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A rigid body is made of three identical thin rods fastened together in the form of a letter H. The body is free to rotate about a horizontal axis that passes through one of the legs of H. The body is allowed to fall from rest from a position in which the plane of the H is horizontal. Then the angular speed of the body when the plane of the H is vertical is -

  1. square root of 9 g divided by 4 L end root  
  2. square root of 3 g divided by 4 L end root  
  3. square root of 3 g divided by L end root  
  4. None of these  

The correct answer is: square root of 9 g divided by 4 L end root

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