A 530-kg crate rests on a level floor at a shipping dock

Question

Compute all parts of given question:

Question: A 53.0-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.790 and 0.440, respectively.

Part A: What horizontal pushing force is required to just start the crate moving?

N

part B: What horizontal pushing force is required to slide the crate across the dock at a constant speed?

N

If possible just a brief explanation how you got the answer?