# 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 ?
foot] = velocity of the foot, M = effective striking mass of the leg, m = mass of the ball and l = the coefficient of restitution.
f,before] = velocity of the foot before impact, l = the coefficient of restitution, [m.
The rules of major-league baseball specify that a baseball's coefficient of restitution must lie between 0.
He assumes, for example, that the collision between a bat and a ball has the same coefficient of restitution as that measured officially by firing a baseball at 85 feet per second at a wall of ash.
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.
The coefficient of restitution e does not depend on the pre-impact velocity and can be expressed in the form
9g, and a coefficient of restitution ranging between 0.
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.
An accepted methodology of measuring coefficient of restitution demonstrated the hit distance of the baseball has increased approximately 30 feet from the time Hank Aaron retired.
by coefficient of restitution (COR), which may be defined in terms of velocities, energy or other state variables.
Baseball ball pace is measured using the PennBounce apparatus, designed by Penn State University, in order to accurately generate a field's Coefficient of Restitution (COR) value.

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