Power: Difference between revisions

Latest revision as of 00:22, 21 January 2010

This article is about a physical quantity.
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Definition

The power due to an applied force is defined as the work done by that force per unit time. Instantaneous power refers to the differential of the work done with respect to time, and average power over a time period refers to the ratio of the total work done to the total time.

Units and dimensions

Question	Answer
Scalar or vector?	Scalar
Instantaneous or time-cumulative?	Instantaneous in one interpretation, time-cumulative in another interpretation
MLT dimensions?	$ML^{2}T^{-3}$ : MLT;1;2;-3
SI units?	$W$ (Watt), equal to $kgm^{2}/s^{3}$ or $J/s$ (Joules per second) or $Nm/s$ (Newton-meters per second)

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 ==Units and dimensions==
-The MLT dimensions of power are <math>ML^2T^{-3}</math>. The SI units are <math>J/s</math> or Joules/second, or <math>kgm^2/s^3</math>, or kilograms meter squared per second cubed.
+{| class="sortable" border="1"
+! Question !! Answer
+|-
+| Scalar or vector? || [[Quantity type::Scalar]]
+|-
+| Instantaneous or time-cumulative? || [[Quantity type::Instantaneous]] in one interpretation, time-cumulative in another interpretation
+|-
+| MLT dimensions? || <math>ML^2T^{-3}</math>: [[MLT::MLT;1;2;-3]]
+|-
+| SI units? || <math>W</math> (Watt), equal to <math>kgm^2/s^3</math> or <math>J/s</math> (Joules per second) or <math>Nm/s</math> (Newton-meters per second)
+|}