You put the tip of the chisel against the stone and tap the butt end of it with a hammer. The tip of the chisel cuts into the stone with a considerable force, and if you're only paying attention to that, it might look like the force came from nowhere. You might ask "how did that chisel cut into that rock when there was no distance for it to ove and build up momentum?" In fact, it's not mysterious at all, but to understand it you have to look at what else is happening.

Same kind of thing for driving a nail into wood, using a wedge and a maul to split logs...

See if you can come up with other examples.