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chapter 11 vocab

frame of reference is a system of objects that are not moving with respect to one another
relative motion is movement in relation to a frame of reference
distance is the length of the path between two points
vector is a quantity that has magnitude and direction
resultant vector the vector sum of two or more vectors
speed is the ratio of the distance an object moves to the amount of time the object moves
average speed computed for the entire duration of a trip
instantaneous speed is the rate at which an object is moving at a given moment in time
velocity is a description of both speed and direction of motion
acceleration a rate at which velocity changes
free fall the movement of an object toward earth solely because of gravity
constant acceleration is a steady change in velocity
linear graph the displayed data form straight line parts
nonlinear graph a curve connects the data points that are plotted
Created by: vanessa.arthur