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Erg
Unit system metric
Unit of energy
Symbol erg
Unit conversions
1 erg in ... ... is equal to ...
SI units 1×10-7 J
Imperial/US unit(s) 7.379×10-8 ft.lbf

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The erg is a unit of energy and work equal to 10−7 joules. It originated in the centimetre–gram–second (CGS) system of units. It has the symbol erg.

The erg is not an SI unit. An erg is the amount of work done by a force of one dyne exerted for a distance of one centimetre. In the CGS base units, it is equal to one gram centimeter-squared per second-squared (g·cm2/s2). It is thus equal to 10-7 joules or 100 nanojoules (nJ) in SI units.

An erg is approximately the amount of work done (or energy consumed) by one common house fly performing one "push up", the leg-bending dip that brings its mouth to the surface on which it stands and back up.

This article uses material from the Wikipedia article "Erg", which is released under the Creative Commons Attribution-Share-Alike License 3.0.