| A | B |
|---|
| Work | equal force x distance |
| joule | a unit of work |
| lever | a simple machine consisting of a bar that is free to pivot on a fulcrum |
| load | an object that requires force to be moved over a distance |
| machine | a mechanical device that transmits, modifies, or changes the direction of force in order to help people do work |
| mass | amount of matter an object contains |
| mechanical advantage | advantage created by a machine that enables people to do work while using less force |
| newton | international unit of force |
| pulley | a simple machine that consists of a wheel that rotates around a stationary axle |
| ramp | an inclined plane |
| simple machine | a machine that requires only the force of a human to perform work |
| six types of simple machines | lever, wheel and axle, pulley, inclined plane, wedge, and screw |
| wheel | disk that turns around an axis and transfers force to and from an axle |
| potential and kinetic | two types of energy |
| two categories of simple machines | inclined planes & levers |
| screw | inclined plane wrapped around a post |
| inclined plane | ramp or slope that reduces the force you need to exert or lift an object |
| wedge | inclined plane that uses the sharp, narrow edge to cut through materials |
| fulcrum | bar that turns or pivots on a fixed point |
| gear | wheel with teeth that is used to transfer forces from one part of a machine to another part |
