2. Questions Bank
  3. 9th Class
  4. Science
  5. Work and energy

9th Class Science Work and energy Question Bank Work Power and Energy Summative Objective Problems

  • question_answer
    A lorry and a car moving with the same kinetic energy are brought to rest by application of brakes which

    A)  Lorry                    

    B)  Car

    C)  Both

    D)  None

    Correct Answer: C

    Solution :

      Work done by retarding force (W) = Loss in KE We know, W = FS As the retarding force is same for both car and lorry, both of them covers same distance before coming to rest.                           


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