Vocabulary and quotes

jolt, jar, jounce, shock (verb)
a sudden jarring impact

"the door closed with a jolt"; "all the jars and jolts were smoothed out by the shock absorbers"
bounce, jounce (verb)
move up and down repeatedly
jounce (Noun)
The fourth derivative of the position vector with respect to time; The time derivative of acceleration.
jounce (Verb)
To jolt; to shake, especially by rough riding or by driving over obstructions.
Jounce
In physics, jounce or snap is the fourth derivative of the position vector with respect to time, with the first, second, and third derivatives being velocity, acceleration, and jerk, respectively; in other words, the jounce is the rate of change of the jerk with respect to time. Jounce is defined by any of the following equivalent expressions: the following equation is used for constant jounce. ⁕ ⁕ ⁕ ⁕ where The notation is not to be confused with the displacement vector commonly denoted similarly. Currently, there are no well-accepted designations for the derivatives of jounce. The fourth, fifth and sixth derivatives of position as a function of time are "sometimes somewhat facetiously" referred to as "Snap", "Crackle", and "Pop" respectively. The dimensions of jounce are distance per. In SI units, this is "metres per quartic second", "metres per second per second per second per second", m/s4, m · s-4.

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