Chapter 2, Part 1
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Created by:
mrparker71 Plus on August 18, 2009
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16 terms
Terms | Definitions |
|---|---|
 Relative | Regarded in relation to something else. |
| Frame of reference | Your point of view; your choice of what to compare an object's motion to. |
| Speed | A scalar quantity that represents the distance an object travels in a given amount of time; change in distance divided by change in time. |
| Instantaneous speed | The speed with which an object is moving at a specific point in time. |
| Average speed | A measure of how long it took to travel a certain distance; total distance divided by total elapsed time. |
| Velocity | A vector quantity which refers to "the rate at which an object changes its position;" speed in a given direction. |
| Constant velocity | Constant speed & constant direction. |
| Acceleration | A vector quantity which is defined as change of velocity; the rate at which the velocity of an object changes; change in velocity divided by change in time. |
| Rate | A ratio between two measurements, often with different units; in this course, it is usually a quantity divided by time. |
| Mechanics | The study of the motion of objects. |
| Kinematics | The science of describing the motion of objects using words, diagrams, numbers, graphs, and equations. |
| Scalars | Quantities that are fully described by a magnitude (or numerical value) alone. |
| Vectors | Quantities which are fully described by both a magnitude and a direction. |
| Distance | A scalar quantity which refers to "how much ground an object has covered" during its motion. |
| Displacement | A vector quantity which refers to "how far out of place an object is"; it is the object's overall change in position. |
| Constant acceleration | When the velocity of an object is changing by a constant amount each second. |
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