In SI, the unit of torque, the torque exerted by a force of 1 newton acting at a perpendicular distance of 1 meter from the specified axis of rotation.
Note that although a joule is a newton meter, a newton meter is not a joule. The force in the definition of a joule acts in the direction along which the meter is measured, not at right angles to it.
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Last revised: 8 March 2008.