JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Work Done by Constant Force

  • question_answer
    A ball of mass m moves with speed v and strikes a wall having infinite mass and it returns with same speed then the work done by the ball on the wall  is          [BCECE 2004]

    A)             Zero    

    B)             \[mv\ J\]          

    C)             m/v J  

    D)             v/mJ

    Correct Answer: A

    Solution :

                    The ball rebounds with the same speed. So change in it's Kinetic energy will be zero i.e. work done by the ball on the wall is zero.


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