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:
“The terror of the atom age is not the violence of the new power but the speed of man’s adjustment to it—the speed of his acceptance.”
—E.B. (Elwyn Brooks)
“No speed of wind or water rushing by
But you have speed far greater.”
—Robert Frost (1874–1963)
“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)