coefficient of restitution


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coefficient of restitution

[¦kō·ə′fish·ənt əv ‚res·tə′tü·shən]
(mechanics)
The constant e, which is the ratio of the relative velocity of two elastic spheres after direct impact to that before impact; e can vary from 0 to 1, with 1 equivalent to an elastic collision and 0 equivalent to a perfectly elastic collision. Also known as restitution coefficient.
References in periodicals archive ?
The periodic motion is observed for low values of the crank speed and coefficient of restitution. For a given set of parameter values, initial condition and time scale affected the appearance of the response.
Parameters Symbols Unit Value Acceleration of gravity g m/[s.sup.2] 9.8 Coefficient of restitution between [e.sub.1] -- 0.8 the free mass and the drill tool Coefficient of restitution between [e.sub.2] -- 0.9 the free mass and the percussive horn Vibration amplitude of the [A.sub.0] [micro]m 15 percussive horn Vibration frequency of the f kHz 20 percussive horn Mass of percussive horn [m.sub.u] kg 0.08 Mass of drill tool [m.sub.v] kg 0.05 Mass of free mass [m.sub.w] kg 0.008
* The coefficient of restitution was chosen to be fxed at e = 0 for the least-square reconstruction.
Importantly, this seems to be a default value assumed by observers, as the depictions were devoid of any information that could be used to infer the coefficient of restitution. On the one hand, being schematic depictions, the stimuli provided no information about the balls' materials.
It would be advisable that future research take into account the physical differences between SC and LC balls, such as mass, diameter, and coefficient of restitution, in order to determine their influence on corresponding performance variables.
NCAA standard for testing baseball bat performance, bat-ball coefficient of restitution. Retrieved from http://fs.ncaa.org/Docs/rules/baseball/bats/NCAA%20BBCOR%20Protocol %20FINAL%205%2009.pdf
Viscous damping effect is evaluated by a coefficient of restitution. The average value of the normal grain-wall coefficient of restitution [c.sup.n.sub.w] = 0.5 was obtained by the grain-bed collision experiments performed in the wind tunnel (Wang 2008) was taken for current simulations.
The disadvantage of this model is that the variation of 1 b influences the final velocity of impact only a little; thus the coefficient of restitution e becomes large.
An important parameter for the desired key features of the golf ball's core is said to be the coefficient of restitution (COR).
Golf Association's .830 limit on the "coefficient of restitution"--essentially, a club's hotness.
The coefficient of restitution (COR), an indirect measure of the potential distance a golf ball can be driven, was measured for six golf balls in order to determine whether there is a direct relationship between the cost of a golf ball and the ball's quality.

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