Power
Power, abbreviated as P or PWR, is the rate of doing work or the rate of using energy per unit time.
Power formula
\(\large{ P = \frac{W}{t} }\) |
\(\large{ P = F \; v }\) |
\(\large{ P = \frac{F \; d}{t} }\) |
\(\large{ P = \Delta p \; Q }\) |
\(\large{ P = \gamma \; h_l \; Q }\) |
\(\large{ P = \frac{E}{t} }\) |
\(\large{ P = I^2 \; R }\) |
Where:
Units | English | Metric |
\(\large{ P }\) = power | \(\large{W}\) | \(\large{\frac{kg-m^2}{s^3}}\) |
\(\large{ I }\) = current | \(\large{I}\) | \(\large{\frac{C}{s}}\) |
\(\large{ d }\) = displacement | \(\large{ft}\) | \(\large{m}\) |
\(\large{ E }\) = energy | \(\large{lbf-ft}\) | \(\large{J}\) |
\(\large{ F }\) = force | \(\large{lbf}\) | \(\large{N}\) |
\(\large{ h_l }\) = head loss | \(\large{ft}\) | \(\large{m}\) |
\(\large{ \Delta p }\) = pressure drop | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ R }\) = resistance | \(\large{\Omega}\) | \(\large{\frac{kg-m^2}{s^3-A^2}}\) |
\(\large{ \gamma }\) (Greek symbol gamma) = specific weight | \(\large{\frac{lbf}{ft^3}}\) | \(\large{\frac{N}{m^3}}\) |
\(\large{ t }\) = time | \(\large{sec}\) | \(\large{s}\) |
\(\large{ v }\) = velocity | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) |
\(\large{ Q }\) = volumetric flow rate | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) |
\(\large{ W }\) = work | \(\large{lbf-ft}\) | \(\large{J}\) |
Tags: Equations for Power