A dockworker loading crates on a ship findsthat a 18 kg, Ask an Expert

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A dockworker loading crates on a ship findsthat a 18 kg crate, initially at reston a horizontal surface, requires a 78N horizontal force to set it in motion. However, after the crate isin motion, a horizontal force of 56 Nis required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.

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