If there is no acceleration, is there work done when a body is moved through a distance? Force requires mass and acceleration. Without acceleration then no force, no work? Then if a body is moved at constant speed, is there any work done? What if the body is moved at constant speed against friction? Is there acceleration because the movement, even though it is a constant speed and is in equilibrium, must have a constant push to continue the movement? First time user. I tried searching for this specific question, found several related and helpful answers. But did not find a complete answer.