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NEET Sample Paper NEET Sample Test Paper-43

  • question_answer
    Three identical rods each of mass M, length \[\ell \] are joined to form an equilateral \[\Delta ABC.\]Find the MOI about BC as shown -

    A) \[\frac{2}{3}M\ell \]       

    B) \[\frac{M\ell }{4}\]

    C) \[\frac{M{{\ell }^{2}}}{2}\]        

    D) None of these

    Correct Answer: C

    Solution :

    \[I={{I}_{1}}+{{I}_{2}}+{{I}_{3}}\] \[=\frac{M{{(\ell \,\sin \,60{}^\circ )}^{2}}}{3}+\frac{M{{(\ell \,\sin 60{}^\circ )}^{2}}}{3}+0=\frac{M{{\ell }^{2}}}{2}\]


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