Difference between revisions of "Speed"
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| − | In | + | In [[physics]], speed refers to the magnitude of the [[velocity]] of an object. |
'''Speed''' is the total [[distance]] traveled divided by the [[time]] it takes to travel it<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>. | '''Speed''' is the total [[distance]] traveled divided by the [[time]] it takes to travel it<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>. | ||
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<math>Speed=\frac{d D}{d t}</math> | <math>Speed=\frac{d D}{d t}</math> | ||
| − | Note that speed is a scalar, therefore it has no direction or sign. | + | Note that speed is a [[scalar]], therefore it has no direction or sign. |
Like velocity, units for its measurement are [[meter]]/[[second]] and more commonly in informal circumstances [[kilometer]]/[[hour]] and [[mile]]/[[hour]]. | Like velocity, units for its measurement are [[meter]]/[[second]] and more commonly in informal circumstances [[kilometer]]/[[hour]] and [[mile]]/[[hour]]. | ||
Revision as of 02:13, November 15, 2007
In physics, speed refers to the magnitude of the velocity of an object.
Speed is the total distance traveled divided by the time it takes to travel it[1].
<math>Speed=\frac{d D}{d t}</math>
Note that speed is a scalar, therefore it has no direction or sign.
Like velocity, units for its measurement are meter/second and more commonly in informal circumstances kilometer/hour and mile/hour.
References
- ↑ Serway and Beichner, Physics for Scientists and Engineers, Fifth Edition