| A | B |
|---|
| acceleration | changes in speed |
| balanced forces | when opposite on an object are equal-the result is no motion |
| force | push or pull on an object |
| friction | force that can slow down a motion |
| fulcrum | the turning point of a lever, the place that pivots |
| gravity | the force of attraction between all masses, pulls things down to earth |
| inertia | object at rest tends to stay at rest and an object in motion tends to stay in motion |
| kinetic energy | energy that is in motion (moving energy) |
| lever | a board or bar that rests on a turning point |
| load | an object that a simple machine moves |
| mass | the amount of matter in on object |
| matter | anything that has matter and takes up space |
| momentum | the greater the mass, the more the momentum |
| motion | the process of changing position |
| potential energy | energy that is stored (not in motion yet) |
| pulley | machine made up of a wheel and a rope |
| simple machine | a tool that makes work easier |
| speed | rate of motioin, distance times time |
| unbalanced forces | when opposite force are not equal, resulting in motion |
| screw | an inclined plaine wrapper around a cylinder |
| velocity | speed in a specific direction |
| wedge | machine used to push two objects apart. (knife,nail,doorstop) |
| weight | a measure of the force of gravity on an object |
| wheel and axel | machine of a wheel and rod that goes through the wheel |
