| A | B |
|---|
| force | a push or pull |
| friction | occurs when two objects rub against each other |
| sliding friction | created when an object slides against another object |
| rolling friction | created when an object rolls over a surface |
| inertia | an objects tendency to stay in motion or at rest unless an outside force interferes |
| balanced forces | when the force pushing on an object is equal to the force of the object itself |
| unbalanced forces | when the force pushing on an object is not equal to the force of the object itself. This is what causes a change in position. |
| equilibrium | no motion or change |
| speed | how fast an object travels |
| velocity | how fast and in what direction an object travels |
| acceleration | a change in velocity |
| constant speed | when an object travels at the same, unchanging velocity |
| energy | the ability to do work |
| potential energy | the energy that is stored in an object. It’s an object’s position or circumstance which gives it this particular type of energy |
| kinetic energy | the energy of motion |
| Newton's 1st law of motion | An object at rest tends to stay at rest, and an object in motion tends to stay in motion, unless acted upon by an outside, unbalanced force |
| Newton's 2nd law of motion | Acceleration of an object depends on the force and mass |
| Newton's 3rd law of motion | For every action, there is an equal and opposite reaction |
