Speed

Speed

In kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

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Famous quotes containing the word speed:

    “Wait, Kate! You skate at such a rate
    You leave behind your skating mate.
    Your splendid speed won’t you abate?
    He’s lagging far behind you, Kate.”
    —David Daiches (b. 1912)