jerk

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jerk

[jərk]
(mechanics)
The rate of change of acceleration; it is the third derivative of position with respect to time.
A unit of rate of change of acceleration, equal to 1 foot (30.48 centimeters) per second squared per second.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Bob Calvert, he tells us "paces and jerks around the boards decked out in a patent-leather aviator's uniform, like an evil Action Man doll."
Cooper doesn't play cool-in-the-studio like Bruce Nauman; rather, from behind the camera he hyperventilates, squeals like a tortured rodent, hurls things, and jerks around in an impish fit.