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Easy

Question

Two thin rods of mass m and length l each are joined to form l shape as shown. The moment of inertia of rods about an axis passing through free end (O) of a rod and perpendicular to both the rods is:

  1. fraction numerator 2 over denominator 7 end fraction m l to the power of 2 end exponent    
  2. fraction numerator m l to the power of 2 end exponent over denominator 6 end fraction    
  3. m l to the power of 2 end exponent    
  4. fraction numerator 5 m l to the power of 2 end exponent over denominator 3 end fraction    

The correct answer is: fraction numerator 5 m l to the power of 2 end exponent over denominator 3 end fraction

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