I raised a 20 kg rock 1.5 m off the ground. I am just holding it now. Nothing is moving (except for the muscles in my back and arms that are twitching like crazy--doing work--but that's internal energy/work). So how much mechanical work am I doing now
Since the object is not moving any distance, no matter how big of a force you are exerting you are not actually doing any work since W=Fd. Hope this helps!
