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    maddiegillis's Avatar
    maddiegillis Posts: 3, Reputation: 1
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    #1

    Nov 19, 2012, 09:33 PM
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    A force of 20N is applied to a 6.0kg mass over a distance of 10m. If the final speed of the mass is 6.0m/s, the energy lost to friction is?
    Terciel's Avatar
    Terciel Posts: 7, Reputation: 1
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    Nov 20, 2012, 02:02 PM
    Work = Force*Distance so W=20*10 = 200. Kinetic Energy is 1/2*mv^2 so .5(6)(6^2) = 108. Both of these are in joules. Without friction the blocks kinetic energy would be 200 joules so the friction loss is 92 joules.

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