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1-Dimensional Motion
Vocabulary
| Term | Definition |
|---|---|
| Speed | how fast an object is moving |
| Velocity | an object's speed AND the direction it is moving |
| Direction | can be positive (forward or right) or negative (backward or left) |
| Acceleration | change in the magnitude, OR direction, of an object's velocity (speeding up or slowing down) |
| Magnitude | size (number) |
| Distance | total change in an object's position |
| Position | exact location of an object |
| Displacement | an object's distance from its origin and its direction (a.k.a. position) |
| Origin | an object's starting point |
| Average Velocity | how fast, and in what direction, an object is moving over a period of time |
| Instantaneous Velocity | how fast and in what direction an object is moving at a specific moment in time |
| Slope | how steep a line is on a graph (rise over run); change in Y divided by the change in X |
| One-Dimensional Motion | objects only moving either vertically (up/down) or horizontally (left/right); a.k.a. linear motion |
| Model | representation of something too difficult or impossible to display directly (ex: graph) |
| Frame of Reference | assigns times at positions for an object with respect to a coordinate system |
| Units | international system (SI) for measurement of a number (ex: meters) |
| Symbol | representation of a measurement (variable) often used in equations |
| Interval | specific period of time |
| Position-Time Graph | relationship between an object's position and time (slope represents velocity); a.k.a. a D-T or X-T graph |
| Velocity-Time Graph | relationship between an object's velocity & time (slope represents acceleration) |
| Constant Motion | an object either staying at rest OR maintaining the same motion (speed/velocity) |
| Motion-Dot Diagram | trail of dots representing an object's motion as it changes its position over time (a.k.a. a motion map, ticker-tape, or strobe diagram) |
| Speeding Up | when the velocity of an object and its acceleration are pointed in the same direction (same signs), getting faster |
| Slowing Down | when the velocity of an object and its acceleration are pointed in opposite directions (opposite signs) |
| Kinematics | subject concerning the properties of an object's motion, often using equations |
Created by:
john_bailey720
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