Jump to navigation
Jump to search
## Conversion factors[edit]

## See also[edit]

## References[edit]

The **newton metre** (also **newton-metre**, symbol **N m** or **N⋅m**)^{[1]} is a unit of torque (also called "moment") in the SI system. One newton metre is equal to the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long.

It is also used less commonly as a unit of work, or energy, in which case it is equivalent to the more common and standard SI unit of energy, the joule.^{[2]} In this usage the metre term represents the distance travelled or displacement in the direction of the force, and not the perpendicular distance from a fulcrum as it does when used to express torque. This usage is generally discouraged,^{[3]} since it can lead to confusion as to whether a given quantity expressed in newton metres is a torque or a quantity of energy.^{[4]} However, since torque represents energy transferred or expended per angle of revolution, one newton metre of torque is equivalent to one joule per radian.^{[4]}

Newton metres and joules are dimensionally equivalent in the sense that they have the same expression in SI base units:

Again, N⋅m and J are distinguished in order to avoid misunderstandings where a torque is mistaken for an energy or vice versa. Similar examples of dimensionally equivalent units include Pa versus J/m^{3}, Bq versus Hz, and ohm versus ohm per square.

- 1 kilogram-force metre = 9.80665 N⋅m
^{[5]}^{[6]} - 1 pound-force = 0.45359237 kilogram-force
- 1 newton metre ≈ 0.73756215 pound-force-feet (often "foot-pounds")
- 1 pound-foot (often "foot-pound") ≡ 1 pound-force-foot ≈ 1.35581795 N⋅m
- 1 ounce-inch (often "inch-ounce") ≡ 1 ounce-force-inch ≈ 7.06155181 mN⋅m(milliNewtons-metre)
- 1 dyne-centimetre = 10
^{−7}N⋅m - 1 joule = 1 N⋅m

**^**BIPM – unit symbols**^**For example: Eshbach's handbook of engineering fundamentals - 10.4 Engineering Thermodynamics and Heat Transfer "In SI units the basic unit of energy is newton-metre".**^**Fundamentals of Physics, 9th edition by Halliday Resnick Ralker, p. 309. "The SI unit of torque is the newton-meter. In our discussion of energy we called this combination the joule. But torque is*not*work and torque should be expressed in newton-meters,*not*joules. google books link- ^
^{a}^{b}BIPM - special names **^***Mechanical Engineering Formulas Pocket Guide*, p6**^***Concise encyclopedia of plastics*, by Donald V. Rosato, Marlene G. Rosato, Dominick V. Rosato, p621

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Wikipedia content is licensed under the GFDL and (CC) license