You do 457.2 J of work to move a 4.2 kg chair 9.49 m across the floor at a constant velocity by pushing down on the back of the chair at some angle. If the coefficient of kinetic friction between the chair and the floor is 0.75, what is the angle (relative to the floor) at which you are pushing? Says the answer is 25.6 Degrees, but I'm unsure even the right ways to start this problem. It's not a homework question, just curious if anyone can show me the steps they would use to solve this? Dying to find out.