Physics-
General
Easy

Question

A small bob attached to a light inextensible thread of length l has a periodic time T when allowed to vibrate as a simple pendulum. The thread is now suspended from a fixed end O of a vertical rigid rod of length fraction numerator 3 l over denominator 4 end fraction (as in figure). If now the pendulum performs periodic oscillations in this arrangement, the periodic time will be

  1. fraction numerator 3 T over denominator 4 end fraction    
  2. fraction numerator T over denominator 2 end fraction    
  3. T    
  4. 2T    

The correct answer is: fraction numerator 3 T over denominator 4 end fraction

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