| A | B |
|---|
| acceleration | the rate at which velocity changes over time |
| average speed | the total distance traveled divided by the time it takes to travel that distance |
| balanced force | two or more forces that are equal and opposite of one another; does not cause chang in motion |
| constant speed | speed that does not vary over time |
| contact force | a push or a pull of one object on another through direct touch |
| electrical force | force of attraction or repulsion of charged particles |
| force | a push or a pull on an object |
| friction | the force that one surface exerts on another when the two rub together |
| gravitational force | the force created by gravity |
| gravity | force of attraction between all objects in the universe |
| horizontal | parallel to level ground; at right angles to verticle |
| inertia | the tendency of all objects to resist any change in motion |
| kinetic energy | the energy an object has due to its motion |
| linear | a straight line |
| magnetic force | the attraction or repulsion between magnetic poles |
| motion | the state in which one object's distance from another is changing |
| net force | the overall force acting on an object |
| nonlinear | not a straight line |
| potential energy | stored energy that results from the position or shape of an object |
| reference point | a place or object used for comparison to determine if an object is in motion |
| slope | the ratio of the change in the y coordinates (rise) to the corresponding change in the x coordinates (run) as you move from one point to another along a line |
| speed | the distance an object travels in one unit of time |
| unbalanced forces | when the net force changes an objects motion |
| velocity | speed in a given direction |
| vertical | straight up and down; perpendicular to the horizon |
| horizontal | parallel to level ground; at right angles to verical |
| frequency | the number of times something happens in a period of time |
| x axis | horizontal axis |
| y axis | the vertical axis |
| chemical potential energy | energy stored in chemical bonds |
| elastic potential energy | the energy of stretched or compressed objects |
| gravitational potential energy | potential energy that depends upon an objects height |
