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Question

In the triangular sheet given PQ = QR = l. If M is the mass of the sheet. What is the moment of inertial about PR

  1. fraction numerator M l to the power of 2 end exponent over denominator 24 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. fraction numerator M l to the power of 2 end exponent over denominator 18 end fraction    

The correct answer is: fraction numerator M l to the power of 2 end exponent over denominator 12 end fraction

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