###
Thought Experiment

an attempt at logically reasoning through what has happened.

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Accuracy

how close to the true value, or accepted value, a measurment is.

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Precision

the level of detail to which a measurement is taken.

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Parallax

the appearance of the shift in position of an object due to an actual shift in the position of the observer.

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Particle Model

a simplification of a complex system using particle representation.

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System

the focus of study in an expirement or situation.

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Frame of Reference

any method for locating an object in time and space.

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Displacement

the change in position of an object

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Distance

total path traversed during a given interval of time.

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Vector

any quantity defined by both magnitude and direction

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Scalar

any quantity defined by magnitude

###
Vector Diagram

using vectors to represent displacment within a particle model.

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Average Velocity

the rate of change of position of an object

###
Instantaneous Velocity

the rate of change of position at a given instant in time.

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Average Speed

the total distance traveled during a time interval divided by that time

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Instantaneous Speed

the magnitude of instantaneous velocity

###
Motion Diagram

shows the position of an object at successive times.

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Time Interval

the difference between two times.

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Coordinate System

a system used to describe motion that gives the zero point location of the variable being studied and the direction in which the values of the variable increase

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Origin

the point at which both variables have the value zero

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Position

the separation between an object and the origin.

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Resultant

the vector that represents the sum of the other two vectors.

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Position-Time Graph

data can be represented by plotting the time data on a horizontal axis and the position data on a vertical axis.

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Instantaneous Position

the position at a particular instant.

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Average Acceleration

the rate of change of velocity.

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Free Fall

motion of an object solely under the influence of gravity.

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Physics

the study of the manner of energy.

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