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Physics !!!!! HELP PLEASE

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A hand gun fires a 12.0 g bullet at a speed of 400 m/s.
What is its kinetic energy?
At what speed must a motorcycle of mass 173 kg move to have the same kinetic energy as the bullet? Express your answer in km/h.

  • Physics !!!!! HELP PLEASE -

    K.E. is (1/2) M V^2
    To get it in Joules, M must be in kg.
    bullet KE = 960 Joules

    If motorcycle KE = 960 J,and its mass is 173 kg,

    (1/2)*173*Vm^2 = 960
    then the motorcycle velocity is
    Vm = 3.33 m/s
    Convert that to km/h

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