A warehouse worker is pushing a $90\mathrm{.}0$ kg crate with a horizontal force of $300$ N at a speed of v $=0\mathrm{.}845$ m$/$s across the warehouse floor. He encounters a rough horizontal section of the floor that is $0\mathrm{.}75$ m long and where the coefficient of kinetic friction between the crate and floor is $0\mathrm{.}354.$