| A | B |
|---|
| force | a push or pull |
| friction | the force caused by 2 objects rubbing together that slows down or stops moving objects |
| gravity | the force that pulls objects towards the center of the earth |
| magnetism | the forces that causes magnets to pull on objects that are made of certain metals such as iron. |
| pole | a place on a magnet where magnetism is strongest. |
| work | something done whenever a force moves an object through a distance. |
| simple machine | one of six kinds of tools with few or no moving parts that make work easier. |
| lever | simple machine made of a bar or a board that is supported underneath at the fulcrum. |
| fulcrum | the point on which a lever is supported and moves. |
| incline plane | a simple machine that is a flat surface with one end higher than the other. |
| screw | a simple machine used to hold objects together. |
| pulley | a simple machine made of a wheel and a rope. |
| wheel and axle | a simple machine that has a center rod attached to a wheel. |
| gear | a wheel with jagged edges like teeth. |
| wedge | a simple machine used to cut or split an object. |
