| A | B |
|---|
| force | a push or pull |
| friction | a force that occurs when one object fubs against another object |
| gravity | the force that pulls bodies or objects toward other bodies or objects |
| inclined plane | a simple machine made up of a slanted surface |
| lever | a simple machine made up of a stiff bar that moves freely around a fixed point |
| motion | a change in an object's position as compared to objects around it |
| wheel and axle | a simple machine made up of two cylinders that turn on the same axis |
| pulley | a simple machine made up of a rope fitted around the rim of a fixed wheel |
| screw | a simple machine made up of an inclined plane wrapped around a column |
| simple machine | a simple device that changes a force and makes work easier to do |
| speed | a measure of the distance an object travels in a certain amount of time |
| velocity | the speed and directionof an object in motion |
| wedge | a simple machine made up of two inclined planes |
| position | an object's location |
