A 1,200-N crate rests on the floor. (a) How much work is required to move it at constant speed 4.8 m along the floor against a friction force of 240

A 1,200-N crate rests on the floor. (a) How much work is required to move it at constant speed 4.8 m along the floor against a friction force of 240 N? (b) How much work is required to move it at constant speed the same distance vertically?(c) How much work must be done to stop a 1,670-kg car traveling at 149 km/h?