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.

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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