When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.

Introduction: This lesson provides students with a review of simple machines and their tasks. It works best in combination with your lesson on simple machines, or as a review/additional activity.

Researchers have found that molecular machines can be easily manipulated using very small mechanical energy, taking advantage of the property that they aggregate on the surface of water. Researchers ...