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Geologician (talk | contribs) Accelerating acceleration = jerk |
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One common unit of acceleration is ''[[gee|g]]'', one ''g'' being the acceleration caused by the [[gravity]] of [[Earth]] at [[sea]] level at 45° latitude (Paris), or about 9.81 m/s².
Accelerating acceleration or [[jerk]] is the rate of change of an object's acceleration over time. However, an acceleration of accelerating acceleration would not be distinguished in practice as it would be experienced merely as a different slope of accelerating acceleration.
In [[classical mechanics]], acceleration <math> a \ </math> is related to [[Force (physics)|force]] <math>F \ </math> and [[mass]] <math>m \ </math> (assumed to be constant) by way of [[Newton's laws of motion|Newton's second law]]:
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In special relativity, only [[inertial frame|inertial frames of reference]] (non-accelerated frames) can be used and are equivalent; general relativity considers all frames, even accelerated ones, to be equivalent.
With changing velocity, accelerated objects exist in warped space (as do those that reside in a gravitational field). Therefore, frames of reference must include a description of their local spacetime curvature to qualify as complete.
==See also==
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