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26 July, 10:01

A crate with a mass of m = 130 kg rests on the horizontal deck of a ship. The coefficient of static friction between the crate and the deck is As-0.86. The coefficient of kinetic friction is μk-0.41. Randomized Variables m 130 kg μ,-0.86 Pk=0.41 25% Part (a) Write an expression for the minimum force, F, n, that must be applied to get the block moving from rest. Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining:5 (5% per attempt) detailed view 0 Submit Part (b) What is the magnitude of the force F, n in newtons? Part (c) Write an expression for the force F, that must be applied to keep the block moving at a constant velocity Part (d) what is the magnitude of the force F., in newtons?

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  1. 26 July, 10:12
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    a, b)

    Minimum force required to move the crate

    = maximum static friction

    = μs x mg

    = 0.86 x 130 x 9.8

    = 1095.64 N

    c, d) Force required to keep the crate in uniform motion or net force is zero.

    F = maximum kinetic friction

    = μk x mg

    =.41 x 130 x 9.8

    = 522.34 N
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