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9th Class Science Work and energy Question Bank Work, Energy and Power

  • question_answer
    A lorry and a car with the same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?

    A)  Lorry

    B)  Car

    C)  Both will stop at the same distance  

    D)  Car stops first but takes longer distance.

    Correct Answer: C

    Solution :

     Loss of \[K.E.\,\,=\] work done\[=FS\] Both the retarding force \[F\] and \[K.E.\] are the same. So, both the lorry and the car would come to rest at the same distance.


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