| A | B |
|---|
| motion | The state in which one objects distance from another is changing. |
| Reference Point | A place or object used for comparison to determine if an object is in motion. |
| Distance | A space between 2 points traveled. |
| S.I. | International system of Measurments based on the number 10. |
| Metric System | The internation system of measurement based power of 10 |
| Speed | The distance an object travels in one unit of time. |
| Force | A push or pull that is exerted on an object |
| Gravity | The force that pulls objects to each other. |
| Inertia | The tendancy to move in a straight line. |
| Momentum | The product of an objects mass and velocity. |
| Velocity | The speed on an object in a given direction |
| Weight | A measurement of the force of gravity of an object |
| Work | Forces exerted on an object that causes it to move |
| Friction | A force that is exerted when two objects are rubbed together |
| Net Force | The over all force on an object when all of the forces are considered |
| Balanced Forces | Equal forces acting on a object in opposite directions |
| Unbalanced Forces | Unequal forces acting on an object which cause movement |
| Rate | A fixed ratio between two things |
| Constant Speed | When the speed of an object does not change |
| Average Speed | The distance traveled divided by the time |
| Acceleration | The rate at which velocity changes |
| Sliding Friction | The friction that occurs when one solid surface slides over another solid surface |
| Rolling Friction | The friction that occurs when an object rolls over a surface |
| Fluid Friction | The friction that occurs as an object moves through a liquid |
| Free Fall | The motion of a falling object when only gravity is present |
| Air Resistance | The fluid friction of a falling object falling through the air |
| Bouyant Force | The upward force exerted by a fluid on a submerged object |
| Density | The measurement for mass |
