Ok, so I was doing this problem, *NOT* a homework problem, where I was solving for the force (and eventually, the work) required to move a body with a mass of m distance x in a given time y. I know that theoretically there would not be any force because there is no given acceleration and therefore no force ( F = mass * acceleration) but I considered that friction, etc. does not allow for perpetual movement at a constant speed, so with friction there has to be some acceleration to at the very least override the forces of friction and the like to have a net velocity > 0. Is there a fundamental equation that can be used to calculate the forces against a body? I know that deceleration due to gravity is -9.8(sin [tex]\Theta[/tex]) because gravity accelerates the falling of a body. At a 90 degree angle the deceleration is 9.8 m/s2. Any other slope follows that formula. I do have another question that is a bit off topic: Would it be fair to say that the more energy is used by a system, the more waste heat is generated and as a result q / w approaches 1? Keep in mind that my understanding of physics is not very broad thus far and everything I have learned is either intuitive classical physics I picked up through practical learning (like that gravitational formula), quantum physics taught by chemistry professors, and work examples given by calculus professors. I have never had a physics class in my life, including HS. Thanks everyone.