potentially, yeah. also i'm not sure what OP is implying specifically, there could well be multiple things wrong with it, but that calculation takes no account of drag, air resistance, or friction. I can tell you from experience that even university level physics likes to ignore that shit a lot of the time lol. generally, whenever you're applying force/energy to anything, a significant amount is going to be lost to heat, drag, sound, etc but nobody likes to acknowledge it because it can make calculations annoying.