Physics-
General
Easy

Question

A Tjoint is formed by two identical rods A and Beach of mass m and length L in the X Yplane as shown. Its moment of inertia about axis coinciding with A is

  1. fraction numerator 2 blank m L to the power of 2 end exponent over denominator 3 end fraction    
  2. fraction numerator m L to the power of 2 end exponent over denominator 12 end fraction    
  3. fraction numerator m L to the power of 2 end exponent over denominator 6 end fraction    
  4. None of these    

The correct answer is: fraction numerator m L to the power of 2 end exponent over denominator 6 end fraction


    I equals I subscript x end subscript plus I subscript y end subscript equals fraction numerator m L to the power of 2 end exponent over denominator 12 end fraction plus fraction numerator m L to the power of 2 end exponent over denominator 12 end fraction equals fraction numerator m L to the power of 2 end exponent over denominator 6 end fraction

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