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Haryana PMT Haryana PMT Solved Paper-2004

  • question_answer
    A sphere is accelerated upwards by a cord whose braking strength is four times its weight. The maximum acceleration with which the sphere can move up without breaking the cord is :

    A) \[g\]                                                     

    B)  3g    

    C)  2g                                         

    D)  4g

    Correct Answer: B

    Solution :

                                             Here the tension in the cord is given by \[T=mg+ma\] (Here: upwards acceleration = a, mass of sphere =m, T=4mg) So,        \[4mg=mg+ma\]                                 \[3mg=ma\]                                 \[g=\frac{a}{3}\] or                            \[a=3g\]


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