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 classic literature ?
In his teeth the villain held the bell-rope, which he kept jerking about with his head, raising such a clatter that my ears ring again even to think of it.
I've got him here," he whispered, jerking his thumb over his shoulder; "he's all right.
Miranha or Amajuaca cannibals," said Challenger, jerking his thumb towards the reverberating wood.
There you toss and tumble about for a couple of hours or so, varying the monotony by occasionally jerking the clothes off and getting out and putting them on again.
Ethan's heart was jerking to and fro between two extremities of feeling, but for the moment compassion prevailed.
He had long worshipped her from afar, but nothing more intimate than a 'Good morning, Miss Jeanne', had escaped him, till one day during a slack spell he came upon her in the little passage leading to the kitchen, her face hidden in her apron, her back jerking with sobs.
It's like jerking down the mercury in a thermometer: just a trick.