Compute each part of given problem:
Problem: You apply a constant net horizontal force of 65.5 N to a crate that rests on a smooth horizontal floor. The frictional force is negligible. The crate starts from rest and moves 10.5 m in 6.00 s.
Part A: What is the mass of the crate?
Part B: If you stop pushing after 6.00 s, how far does the block move in the next 6.00 s?
Please explain each step and equations used for above problem.