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In physics, tug is sometimes used to denote the derivative of yank with respect to time, or mass multiplied by jounce. It is equal to the third derivative of momentum with respect to time. Though not universally accepted as an official term for this quantity, the term tug is commonly used.^{[citation needed]}
Tug is described by the following equation:
where
The units of tug are yank per time, or equivalently, mass times length per time to the 4th power; in the SI unit system this is kilogram metres per second to the fourth (kg·m/s^{4}), or newtons per second squared (N/s^{2}).
References
 Yank and Hooke's Constant Group — "It has been proposed here that yank and tug be respectively the rate of change of force and the rate of change of yank".
 UCR Mathematics — "So far tug (symbol T) has been suggested for rate of change of yank"
 What is the term used for the third derivative of position?
See also
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This article uses material from the Wikipedia article Tug (physics), that was deleted or is being discussed for deletion, which is released under the Creative Commons AttributionShareAlike 3.0 Unported License.
