What is speed?

  • (noun): Distance travelled per unit time.
    Synonyms: velocity
    See also — Additional definitions below

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.

Read more about Speed.

Some articles on speed:

Moore's Law - Consequences and Limitations - Transistor Count Versus Computing Performance
... higher transistor density does not greatly increase speed on many consumer applications that are not parallelized ... Viewed even more broadly, the speed of a system is often limited by factors other than processor speed, such as internal bandwidth and storage speed, and one can judge a system's ...
Tonya Harding - Automobile Racing Land Speed Record
... On August 12, 2009, Harding set a new land speed record for a vintage gas coupe with a speed of 97.177 mph driving a 1931 Ford Model A, named Lickity - Split, on the Bonneville Salt Flats ...
Johnson, Arkansas - Reputation As A Speed Trap
... Johnson has a reputation as a speed trap ... During most days the police will have one car staged to control the speed along Main Drive (East and West) or Wilkerson (North and South) ... When driving through Johnson, one should be careful to observe the posted speed limit, and wear your seat belt ...
Examples of Different Speeds
... Speed m/s ft/s km/h mph Notes Approximate rate of continental drift 0.00000001 0.00000003 0.00000004 0.00000002 4 cm/year ... Varies depending on location Speed of a common snail 0.001 0.003 0.004 0.002 1 millimeter per second ... Sprint runners 10 32.8 22 ... Average speed over 100 meters ...
Speed - Distance of Inter-city Rail
... Development of high-speed rail in some countries increases the share of railway for such longer-distance journeys ... In conventional non high-speed rail, overnight trains are common for this distance ... Faster high-speed rail of 350 km (217 mi), such as the proposed Beijing-Shanghai Express Railway in China (1,300 km/808 mi, or 5 hours) and Tokyo-Sapporo Hokkaido Shinkansen in Japan (1,000 km/621 mi ...

More definitions of "speed":

  • (verb): Travel at an excessive or illegal velocity.
    Example: "I got a ticket for speeding"
  • (noun): A central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression.
    Synonyms: amphetamine, pep pill, upper
  • (noun): A rate (usually rapid) at which something happens.
    Example: "The project advanced with gratifying speed"
    Synonyms: swiftness, fastness
  • (verb): Move very fast.
    Example: "The runner zipped past us at breakneck speed"
    Synonyms: travel rapidly, hurry, zip

Famous quotes containing the word speed:

    If it be aught toward the general good,
    Set honor in one eye, and death i’th’ other,
    And I will look on both indifferently;
    For let the gods so speed me as I love
    The name of honor more than I fear death.
    William Shakespeare (1564–1616)

    No speed of wind or water rushing by
    But you have speed far greater.
    Robert Frost (1874–1963)

    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)