Difference between revisions of "Speed"
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Note that speed is a [[scalar]], therefore it has no direction, and because it is a measure of magnitude, it is never negative. | Note that speed is a [[scalar]], therefore it has no direction, and because it is a measure of magnitude, it is never negative. | ||
| − | 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]]s/[[second]] (m/s), and more commonly in informal circumstances [[kilometer]]s/[[hour]] (kph) and [[mile]]s/[[hour]] (mph). |
==References== | ==References== | ||
Revision as of 06:46, October 5, 2008
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, and because it is a measure of magnitude, it is never negative.
Like velocity, units for its measurement are meters/second (m/s), and more commonly in informal circumstances kilometers/hour (kph) and miles/hour (mph).
References
- ↑ Serway and Beichner, Physics for Scientists and Engineers, Fifth Edition