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27 September, 22:34

Once a 26 kg crate is in motion on a horizontal floor, a horizontal force of 57 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s 2. What is µk, the coefficient of kinetic friction, between the crate and the floor?

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  1. 28 September, 00:55
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    0.22

    Explanation:

    Coefficient of friction = F/R

    But R=W=Mg=26*9.81=255.06

    The horizontal force is 57N

    Therefore

    57/255.06 = 0.22

    The coefficient of friction is dimensionless.
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