A dockworker loading crates on a ship nds that a 20-kg
Chapter 4, Problem 4.35(choose chapter or problem)
A dockworker loading crates on a ship nds that a 20-kg crate, initially at rest on a horizontal surface, requires a 75-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving with a constant speed. Find the coefcients of static and kinetic friction between crate and oor.
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