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A horizontal force of 150 N is used to push a 43.5 kg packing crate a distance of 5.30 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following.
(a) the work done by the 150 N force


(b) the coefficient of kinetic friction between the crate and the surface

  • Physics - ,

    (a) 150 N * (distance moved) = 150*5.3 J

    (b) 150 N = M*g*Uk
    Since there is no increase in speed, the two forces balance

    Solve for the coefficient of kinetic friction, Uk

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