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