joule
Sign in to saveThe joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). In terms of SI base units, one joule corresponds to one kilogram-metre squared per second squared One joule is equal to the amount of work done when a force of one newton displaces a body through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).
AI overview
A joule is the standard unit used worldwide to measure energy, whether that energy comes from work, heat, or electricity. It matters because it provides a common language for scientists and engineers to precisely quantify and compare different forms of energy.
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Key facts
- Unit.symbol
- J
- Unit.name
- joule
- Unit.image
- Definición del Joule.svg
- Unit.imageclass
- skin-invert-image
- Unit.caption
- Intuitive representation of the joule as the work of a motive force
- Unit.standard
- SI
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- energy
- Unit.namedafter
- James Prescott Joule
- Unit.units1
- SI base units
- Unit.inunits1
- kg⋅m2⋅s−2
- Unit.units2
- CGS units
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- erg
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Article
9 sectionsContents
- Definition
- History
- Practical examples
- Multiples
- Conversions
- Newton-metre and torque
- Watt-second
- References
- External links
The joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). In terms of SI base units, one joule corresponds to one kilogram-metre squared per second squared One joule is equal to the amount of work done when a force of one newton displaces a body through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).
== Definition == According to the International Bureau of Weights and Measures the joule is defined as "the work done when the point of application of 1 MKS unit of force [newton] moves a distance of 1 metre in the direction of the force."