A 66.0 kg crate rests on a level floor ata shipping dock. The coefficients of st

Question

A 66.0 kg crate rests on a level floor ata shipping dock. The coefficients of static and kinetic frictionare 0.720 and 0.440, respectively. (a) What horizontal pushing force is requiredto just start the crate moving?
1 N

(b) What horizontal pushing force is required to slide the crateacross the dock at a constant speed?
2 N (a) What horizontal pushing force is requiredto just start the crate moving?
1 N

(b) What horizontal pushing force is required to slide the crateacross the dock at a constant speed?
2 N

Explanation / Answer

A) Fs = smg = .720 x 66 x 9.8 =465.7 N
B) Fk = kmg = .440 x 66 x 9.8 = 284.7N

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