Equal work lifting versus pushing up a plane?? I don't understand anything in physics having to do with work and/or energy. I drew a picture of the problem I'm having now: http://img80.imageshack.us/img80/9834/physicsoc8.png According to every physics book/website ever, the work in getting the object up there is the same in both cases. I can't see why. Can someone please explain this to me? And why is it that just because they get to the same height does it automatically mean the work done is EXACTLY the same?