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Three points masses m , 2 m and 3m are located at the vertices of an equilateral triangle of side ' a '. The moment of inertia of the system about an axis along the altitude of the triangle passing through m is N 20 m a 2 where N is an integer. The value of N is

0 2 Views | Posted 3 weeks ago
Asked by Shiksha User

  • 1 Answer

  • R

    Answered by

    Raj Pandey | Contributor-Level 9

    3 weeks ago

    I A B = m ( 0 ) 2 + 2 m a 2 2 + 3 m a 2 2

    I A B = m a 2 2 + 3 m a 2 4 = 5 m a 2 4 I A B = 25 m a 2 20 = N 20 m a 2 ∴ N = 25

     

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