Poncelet (unit)

Physical unit
Unit name	Poncelet
Unit symbol	${\displaystyle \mathrm {p} }$
Physical quantity (s)	power
dimension	${\displaystyle {\mathsf {K\;L\;T^{-1}}}}$
system	Technical measurement system
In SI units	${\displaystyle \mathrm {1\,p=980{,}665\,W} }$
Named after	Jean-Victor Poncelet

The Poncelet ( unit symbol : p), named after the French physicist Jean-Victor Poncelet , was a unit of measurement of power in France . It was replaced by the now obsolete unit of measurement horsepower (fr .: cheval-vapeur ).

1 p = ⁴ ⁄ ₃ PS = 980.665 watts

1 Poncelet defined the power that has to be provided in order to move a body of mass against the gravitational field of the earth (with standard acceleration ) at a speed of . This results in a performance of ${\displaystyle m=100\;\mathrm {kg} }$ ${\displaystyle g=9{,}80665\;\mathrm {\tfrac {m}{s^{2}}} }$ ${\displaystyle v=1\;\mathrm {\tfrac {m}{s}} }$

${\displaystyle P=m\cdot g\cdot v=100\ \mathrm {kg} \cdot 9{,}80665\ \mathrm {\frac {m}{s^{2}}} \cdot 1\ \mathrm {\frac {m}{s}} =980{,}665\ \mathrm {\frac {kg\;m^{2}}{s^{3}}} =980{,}665\ \mathrm {W} }$

Because the definition of 1 HP only differs in the increased mass (75 kg instead of 100 kg) 1 HP corresponds exactly to ³ ⁄ ₄ Poncelet.

Individual evidence

1. ↑ Peter Kurzweil: The Vieweg unit lexicon . 2 illustrated edition. Springer, 2013, ISBN 3-322-83211-2 , pp. 323 ( limited preview in Google Book search).