Jounce
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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.
Currently, there are no well-accepted designations for the derivatives of jounce. The fifth and sixth derivatives of position as a function of time are "sometimes somewhat facetiously" [1][2] referred to (in association with "Snap") as "Crackle" and "Pop", from the cereal characters; however, these terms have not gained widespread acceptance.
[edit] References
- ^ Visser, Matt (2004-07-24). "Jerk, Snap, and the Cosmological Equation of State". Classical and Quantum Gravity 21 (11): 2603–2616. doi:. ISSN: 0264-9381. http://arxiv.org/abs/gr-qc/0309109. Retrieved on 2007-08-24.
- ^ Gragert, Stephanie (November 1998). "What is the term used for the third derivative of position?". Usenet Physics and Relativity FAQ. Math Dept., University of California, Riverside. http://math.ucr.edu/home/baez/physics/General/jerk.html. Retrieved on 2008-03-12.
[edit] External links
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Look up jounce in Wiktionary, the free dictionary. |
- Cosmography: cosmology without the Einstein equations, Matt Visser, School of Mathematics, Statistics and Computer Science, Victoria University of Wellington, 2004.
- What is the term used for the third derivative of position?
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