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19 May, 01:40

Which has the larger kinetic energy, a 10 g bullet fired at 400 m/s or a 80 kg bowling ball rolled at 6.5 m/s?

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  1. 19 May, 02:06
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    Formulae for Kinetic energy is:

    Kinetic Energy = 1/2xmassx (velocity) ^2

    For comparison we need to have same units, thus we convert 10g into Kg.

    10g/1000=0.01Kg

    Input the value of bullet in the formulae;

    Kinetic Energy = 1/2x0.01kgx (400) ^2

    K. E=800J

    Input value of the ball:

    Kinetic Energy=1/2x80kgx (6.5) ^2

    K. E=1690J

    Which means that th Energy of the ball is more than the bullet.
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