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

  • question_answer
    A truck and a car moving with same kinetic energy are stopped by equal retarding force. Which of them will be stopped in shorter distance?

    A)  Truck

    B)  Car

    C)  Both simultaneously  

    D)  Data not sufficient

    Correct Answer: C

    Solution :

     Kinetic energy lost by both before coming to rest is same. Also the retarding force is same. From work energy theorem,             \[\Delta KE=F\times s\] Since \[\Delta KE\] and \[F\] are same, so s is same.


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