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9th Class Science Force and laws of motion Question Bank Force and Laws of Motion

  • question_answer
    A parachutist of weight W strikes the ground with his legs fixed and comes to rest with an upward acceleration of 3 g. Force exerted by him on the ground during landing is

    A)  W                                          

    B)  2W

    C)  3W                       

    D)         4W  

    Correct Answer: D

    Solution :

     For downwards accelerated movement,\[T=m(g-a)\] During landing, the person is subjected to a retardatio of \[3g\,\,i.e.,\] to an acceleration of\[-3g\]. So,       \[T=m\{g-(-3g)]\]


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