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Chapter 2 - Linear Motion
Vocabulary
11
Physics
11th Grade
10/13/2011

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Term
acceleration
Definition
the rate at which velocity is changing; the change may be in magnitude, direction, or both
Term
average speed
Definition
path distance divided by time interval
Term
elapsed time
Definition
the time that has passed since beginning of an event
Term
free fall
Definition
motion under the influence of gravitational force only
Term
instantaneous speed
Definition
speed at any instant of time
Term
rate
Definition
how fast something happens
Term
relative
Definition
regarded in relation to something else; depends on your point of view, or frame of reference
Term
time
Definition
the duration between two events
Term
uniform acceleration
Definition
acceleration that does not change
Term
Speed
Definition
a scalar quantity (magnitude only) how quickly an object moves or covers a "distance"
Term
Velocity
Definition
a vector quantity (magnitude and direction) speed in a given direction, rate of change of position (aka displacement)
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