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

  • question_answer
    A ball comes back after an elastic collision with a wall. If initial momentum of the ball is P, the impulse on the wall after the collision is

    A)  \[P\]                    

    B)         \[2P\]  

    C)  zero                     

    D)         \[-2P\]

    Correct Answer: B

    Solution :

     Initial momentum of the ball\[=P\] Final momentum of the ball \[=-P\] Change in momentum of the ball \[=-2P\] Momentum imparted to the wall \[=+2P\]


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