A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 298 N at a speed of v = 0.860 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.360. m (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude N direction ---Select--- (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. J (c) Find the speed of the crate when it reaches the end of the rough surface. m/s