| A | B |
|---|
| A force that slows or stops movement | friction |
| a force that pulls objects toward the center of the Earth | gravity |
| a push or a pull | force |
| a net zero that is not zero | unbalanced force |
| a measurement of distance over time | speed |
| a change in motion caused by a change in speed | acceleration |
| how an object's position changes over time | motion |
| a net force that is zero | balanced force |
| objects that remain at rest or in motion unless acted on by a force | inertia |
| an objects speed in a specific direction | velocity |
| a measurement of force | Newton |
| the measure of how heavy an object is | weight |
| these simple machines are wheels with teeth on them that fit together when the simple machines are turned | gears |
| a device that has few parts and makes work easier | simple machine |
| the object that is being moved by a lever | load |
| a combination of two or more simple machines | compound machine |
| an inclined plane twisted into a spiral | screw |
| is the use of force to move an object a certain distance | work |
| a rope over a wheel used to pull things up | pulley |
| the force used to do work | effort force |
| a machine made up of only one part - a flat slanted surface | inclined plane |
| a simple machine with two inclined planes placed back to back | wedge |
| a machine made up of two parts. a bar that moves on a fixed point called a fulcrum | lever |
