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31 July, 12:38

What is the speed of a 48 kg dog running across a lawn with 216 J of energy?

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  1. 31 July, 14:24
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    The speed of dog is 3 m/s!

    Explanation:

    The mass m of the dog is given as 48 kilograms

    And Kinetic energy as 216 joules

    As we know K. E = (1/2) mv^2

    216 = (1/2) * 48 * v^2

    216 = 24 * v^2

    v^2 = 216 / 24

    v^2 = 9

    v = 3 m/s
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