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.
References in periodicals archive ?
In turn, jerkingly raised and lowered by the rolling billows, the towing resistance of the log caused the old reelman to stagger strangely.
I don't know how they did it but it was epic and tear jerkingly good.