﻿

# Yank (physics)

In physics, yank is sometimes used to denote the derivative of force with respect to time or mass multiplied by jerk. In relativistic physics, it is expressed as the second derivative of momentum with respect to time, because the mass is velocity-dependent. Though not universally accepted as an official term for this quantity, the term "yank" is commonly used among physics enthusiasts.Fact|date=April 2008

Yank is described by the following equation::$mathbf\left\{Y\right\}=frac\left\{mathrm\left\{d\right\}^2mathbf\left\{p\left\{mathrm\left\{d\right\}t^2\right\}=frac\left\{mathrm\left\{d\right\}^2\left(mmathbf\left\{v\right\}\right)\right\}\left\{mathrm\left\{d\right\}t^2\right\}=mfrac\left\{mathrm\left\{d\right\}^2mathbf\left\{v\left\{mathrm\left\{d\right\}t^2\right\}+mathbf\left\{v\right\}frac\left\{mathrm\left\{d\right\}^2m\right\}\left\{mathrm\left\{d\right\}t^2\right\}+2frac\left\{mathrm\left\{d\right\}mathbf\left\{v\left\{mathrm\left\{d\right\}t\right\}frac\left\{mathrm\left\{d\right\}m\right\}\left\{mathrm\left\{d\right\}t\right\}$where:$mathbf\left\{p\right\}$ is momentum:$m$ is mass:$mathbf\left\{v\right\}$ is velocity:$t$ is timeNote that when mass is constant (as in non-relativistic physics), the equation reduces to the following::$mathbf\left\{Y\right\}=frac\left\{mathrm\left\{d\right\}^2mathbf\left\{p\left\{mathrm\left\{d\right\}t^2\right\}=mfrac\left\{mathrm\left\{d\right\}^2mathbf\left\{v\left\{mathrm\left\{d\right\}t^2\right\}$

The units of yank are force per time, or equivalently, mass times length per time cubed; in the SI unit system this is kilogram metres per second cubed (kg·m/s3).

References

* [http://arxiv.org/abs/math-ph/0206038 Yank and Hooke's Constant Group] — "It has been proposed [http://math.ucr.edu/home/baez/physics/General/jerk.html 6] that yank and tug be respectively the rate of change of force and the rate of change of yank".
** [http://math.ucr.edu/home/baez/physics/General/jerk.html UCR Mathematics] — "So far yank (symbol Y) has been suggested for rate of change of force"

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• Yank — may refer to: * Yank, the Army Weekly , a newspaper for American soldiers during World War II * Yank (physics), the rate of change in force * Yanks , a 1979 film * Yank Rachell bluesman, mandolin and guitar player. * Yank , the name for the copy… …   Wikipedia

• Jerk — In physics, jerk, jolt (especially in British English), surge or lurch, is the rate of change of acceleration; that is, the derivative of acceleration with respect to time, the second derivative of velocity, or the third derivative of… …   Wikipedia

• Remote Control (game show) — Remote Control is a TV game show that ran on MTV for five seasons from 1987 until 1990. It was MTV s first original non musical program. New episodes were made for first run syndication in 1989. Three contestants answered trivia questions on… …   Wikipedia

• Ireland — This article is about the island. For the sovereign state of the same name, see Republic of Ireland. For the constituent country of the United Kingdom, see Northern Ireland. For other uses, see Ireland (disambiguation). Coordinates …   Wikipedia

• pull — v 1. draw, draft, hale, Physiol. adduct; puff, take a puff or drag, suck in, inspire, inhale, breathe in, drink in; haul, lug, drag, transport; tow, take in tow, row, lead, Naut. warp, Naut. kedge; draggle, trail, trawl, troll. 2. tug, yank,… …   A Note on the Style of the synonym finder

• FUBAR — is an acronym that commonly means Fucked Up Beyond All Repair (used to describe the state of some equipment) or Fucked Up Beyond All Recognition (used to describe a situation or scenario), which now exists in many variations. Although it… …   Wikipedia

• Rob Crow — Infobox Musical artist Name = Rob Crow Img capt = Rob Crow on tour with Pinback Img size = Background = solo singer Birth name = Robert Rulon Crow, Jr. Born = Birth date and age|1971|2|21 New Jersey, United States Origin = Encinitas, California,… …   Wikipedia