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1-Dimensional Motion

Vocabulary

TermDefinition
Speed how fast an object is moving
Velocity an object's speed AND the direction it is moving
Direction can be positive (forward or right) or negative (backward or left)
Acceleration change in the magnitude, OR direction, of an object's velocity (speeding up or slowing down)
Magnitude size (number)
Distance total change in an object's position
Position exact location of an object
Displacement an object's distance from its origin and its direction (a.k.a. position)
Origin an object's starting point
Average Velocity how fast, and in what direction, an object is moving over a period of time
Instantaneous Velocity how fast and in what direction an object is moving at a specific moment in time
Slope how steep a line is on a graph (rise over run); change in Y divided by the change in X
One-Dimensional Motion objects only moving either vertically (up/down) or horizontally (left/right); a.k.a. linear motion
Model representation of something too difficult or impossible to display directly (ex: graph)
Frame of Reference assigns times at positions for an object with respect to a coordinate system
Units international system (SI) for measurement of a number (ex: meters)
Symbol representation of a measurement (variable) often used in equations
Interval specific period of time
Position-Time Graph relationship between an object's position and time (slope represents velocity); a.k.a. a D-T or X-T graph
Velocity-Time Graph relationship between an object's velocity & time (slope represents acceleration)
Constant Motion an object either staying at rest OR maintaining the same motion (speed/velocity)
Motion-Dot Diagram trail of dots representing an object's motion as it changes its position over time (a.k.a. a motion map, ticker-tape, or strobe diagram)
Speeding Up when the velocity of an object and its acceleration are pointed in the same direction (same signs), getting faster
Slowing Down when the velocity of an object and its acceleration are pointed in opposite directions (opposite signs)
Kinematics subject concerning the properties of an object's motion, often using equations
Created by: john_bailey720
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