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10 December, 21:59

Calculate the KE of a 3.1 kg toy cart that moves at 4.8 m/s. Calculate the KE of the same cart at twice the speed.

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  1. 10 December, 23:17
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    When v = 4.8 m/s:

    E. K=mv²/2

    =3,1 (4.8) ²/2

    =35.712J

    when v = 2 (4.8):

    E. K=mv²/2

    =3.1 (9.6) ²/2

    =142.848J
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