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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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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Thiên Di 2 weeks 2021-07-21T12:41:42+00:00 1 Answers 1 views 0

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    2021-07-21T12:42:44+00:00

    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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