instantaneous velocity
the speed and direction of an object at a particular instant
magnitude
the size of a quantity
position
the location of an object relative to an origin
time interval
the formula t(f)-t(i) represents this
vector
a quantity with both magnitude and direction
average velocity
ratio of the change in position to the time interval during which the change occurred
coordinate system
a system that defines the zero point of the variable you are studying
origin
the zero point is also called the
position-time graph
a graph with time data on the horizontal axis and position data on the vertical axis
motion diagram
this shows a series of images showing the position of a moving object over equal time intervals
resultant
a vector that represents the sum of two or more vectors
particle model
a simplified motion diagram that shows the object in motion as a series of points
distance
a scalar quantity that is the length, or size, of the displacement vector
scalar
a quantity that has only magnitude
instantaneous position
the location of an object at a particular instant
displacement
the vector quantity that defines the distance and direction between two positions
average speed
the absolute value of the slope on a position-time graph