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CMC Medical CMC-Medical VELLORE Solved Paper-2014

  • question_answer
    In an equilateral triangle ABC, \[{{F}_{1}},\,\,{{F}_{2}}\] and \[{{F}_{3}}\] are three forces acting along the sides AB, BC and AC as shown in the given figure. What should be the magnitude of \[{{F}_{3}},\] so that the total torque about is zero?

    A)  2 N                       

    B)  4 N     

    C)  6 N                       

    D)  8 N

    Correct Answer: C

    Solution :

                    The total torque above O is given by \[\tau ={{F}_{1}}d+{{F}_{2}}d-{{F}_{3}}d\] \[{{F}_{3}}={{F}_{1}}+{{F}_{2}}\]      \[=4+2\]      \[=6N\]


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