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A dock worker loading crates on a ship finds that a 22 kg crate, initially at rest on a hori- zontal surface, requires a 69 N horizontal force to set...

A dock worker loading crates on a ship finds
that a 22 kg crate, initially at rest on a hori-
zontal surface, requires a 69 N horizontal force
to set it in motion. However, after the crate
is in motion, a horizontal force of 46 N is
required to keep it moving with a constant
speed.
The acceleration of gravity is 9.8 m/s2 .
Find the coefficient of static friction be-
tween crate and floor and find the coefficient of kinetic friction.

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