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17 August, 19:50

two 3.0 kg bullets are fired with speeds of 40 m/s and 80 m/s, respectivley. what are their kinetic energies

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  1. 17 August, 21:32
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    KE = 1/2mv^2

    m = mass of object

    v = velocity (speed of object)

    40m/s bullet:

    3 x 40 = 120

    120 x 1/2 = 60

    Kinetic Energy of 40m/s bullet: 60J

    80m/s bullet:

    3 x 80 = 240

    240 x 1/2 = 120

    Kinetic Energy of 80m/s bullet: 120J
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