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An applied force of 450N is needed to drag a 100kg crate at a constant speed across a horizontal rough floor. Calculate the coefficient of kinetic friction for the crate on the floor.

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  1. Wc = M*g = 100kg * 9.8N/kg = 980 N. = Normal(Fn).

    Fap-Fk = M*a.
    450-u*980 = M*0 = 0.
    -980u = -450.
    u = 0.459

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  2. thank you CUH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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