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College Physics Ch.1
College Physics A strategic Approach 2nd Ed ch 1 terms
| Question | Answer |
|---|---|
| define MOTION | The change of an object's position or orientation with time |
| define TRAJECTORY | the path along which an object moves, which might be a straight line or might be curved |
| define MOTION DIAGRAM | a composit image showing an object's position at several equally spaced instants of time |
| define PARTICLE | an object that can be represented as a mass at a single point in space |
| define MODEL | a simplificaation of reality |
| define PARTICLE MODEL | a simplification in which we treat a moving object as if all of is mass were concentrated at a single point |
| define ONE-DIMENSIONAL (1-D) | an object that can only move along a straight line. |
| define POSITION | location of an object at a particular instance in time |
| define ORIGIN | a fixed reference point from which all distances are to be measured |
| define COORDINATE SYSTEM | an origin, and an axis marked in both the positive and negative directions |
| define COORDINATE | the symbol that represents a position along an axis |
| define DISPLACEMENT | a change of position |
| define TIME INTERVALS | changes in time |
| define UNIFORM MOTION | objects moving along a straight line at a constant speed |
| define VELOCITY | the displacement of an object in a given time interval v=Δx/Δt |
| define SIGNIFICANT FIGURES | a digit that is reliably known |
| SI units for time | second (s) |
| SI units for length | meter (m) |
| SI units for mass | kilogram (kg) |
| Common prefixes M | mega power of 10 6 |
| Common prefixes k | kilo power of 10 3 |
| Common prefixes c | centi power of 10 -2 |
| Common prefixes m | mili power of 10 -3 |
| Common prefixes μ | micro power of 10 -6 |
| Common prefixes n | nano power of 10 -9 |
| 1 in = ?cm | 2.54 cm |
| 1 ft = ?m | 0.305 m |
| 1 mi = ? km | 1.609 km |
| 1 mph = ? m/s | 0.447 m/s |
| 1 m = ?in | 39.37 in |
| 1 km = ? mi | 0.621 mi |
| 1 m/s = ?mph | 2.24 mph |
| define CONVERSION FACTOR | a ratio of values equal to 1 |
| define ORDER OF MAGNITUDE ESTIMATE | a one-signficant-figure estimate or calculation such as estimate of speed indicated by ~ |
| define SCALAR QUANTITY | a physical quantity is described by a single number with a unit - can be positive negative or zero |
| define VECTOR QUANTITY | a quantity that has both a size (how far? how fast?) and a direction (which way?) Graphically represent a vector as an arrow over symbols |
| define MAGNITUDE | the size or length of a vector |
| define DISPLACEMENT VECTOR | displacement quantity having both magnitude and direction and can be represnted by a vector |
| define VELOCITY VECTOR | points the direction of the objects motion and whole magnitude is the object's speed |
Created by:
missMRWhite
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