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40 Cards in this Set

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Quantities in physics, such as mass, volume, and speed, which are fully described by magnitude alone
scalar
The horizonal axis on a graph on which the independent variable is plotted.
x-axis
A vector quantity which describes the rate at which an object changes its position. Also referred to as "speed with direction."
velocity
A scalar quantity which refers to "how much ground an object has covered" during its motion.
distance
The rate at which an object changes its velocity, meaning there is a change in speed, direction, or both.
acceleration
A point, assumed to be stationary, used to describe motion.
frame of reference
Refers to the duration of an action.
time
The vertical axis on a graph on which the dependent variable is plotted.
y-axis
A scalar quantity which refers to "how fast an object is moving."
speed
Refers to the way position changes relative to a starting point. May be indicated by the terms: north, south, positive, negative, up, or down.
direction
A vector quanity which refers to how far out of place an object is, or the object's change in position.
displacement
A quantity that has magnitude and direction.
vector
Refers to where an object is.
position
The degree of exactness with which an operation is performed or a measurement stated.
precision
Freedom from mistake or error; degree of conformity of a measure to a standard or a true value.
accuracy
The accepted measurement system of the scientific community, based on the meter, the kilogram, and the second.
SI/metric
Standar system of measurement used in daily activities in the United States.
USCS
The speed of an object at a specific moment.
instantaneous speed
The factor in an experiment that the researcher chooses to vary at specific intervals; is plotted on the x-axis.
independent variable
The total distance traveled divided by the total time of travel.
average speed
Refers to the degree of inclination or steepness of a line.
slope
The factor whose value changes a the result of a change in the independent variable and is plotted on the y-axis.
dependent variable
Refers to size and is expressed as a numerical value.
magnitude
Total displacement divided by the time interval.
average velocity
The velocity of an object at a specific moment.
instantaneous velocity
Type of motion that describes an object that is not accelerating.
constant velocity
A speed that does not change, such as a steady speed.
constant speed
Acceleration of an object a particular moment.
instantaneous acceleration
Type of motion that describes the steady change in velocity over time.
constant velocity
A simplified description of a physical system intended to capture the essential aspects of the system in a sufficiently simple form.
model
An assumption to be tested; a statement of a problem to be solved, expressed as a question.
hypothesis
A plausible or scientifically acceptable general principle or body of principles offered to explain phenomena.
theory
A specific measure of quantity (as of length, time, heat or value) used as a standard of measurement.
unit
An act of recognizing and noting a fact or occurrence; often involving measurement with instruments.
observation
An operation carried out under controlled conditions in order to discover an unknown effect or law, to test or establish a hypothesis, or to illustrate a known law.
experiment
A statement of an order or relation of phenomena that so far as is known is invariable under the given conditions.
law
Set up and established by authority as a rule for the measure of quanity, weight, extent, value or quality.
standard
Used to check, test or verify experiemnts; usually not itself manipulated during the experiment.
control
Something invariable or unchanging.
constant
A falling object which experiences no friction is in this type of motion and accelerates at a rate of 9.8 m/s2.
freefall