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    A drum of mass ‘m’ kg was rolled down a ramp. At the bottom of the ramp its kinetic energy was 10kJ and velocity was 20m/s. With what velocity (in m/s
    Question

    A drum of mass ‘m’ kg was rolled down a ramp. At the bottom of the ramp its kinetic energy was 10kJ and velocity was 20m/s. With what velocity (in m/s) was it pushed down the ramp if its initial kinetic energy was 625 J?

    A.

    5

    B.

    2.5

    C.

    7.5

    D.

    10

    Correct option is A



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