When the price elasticity of demand for a good is perfectly elastic (Ed is − ∞), any increase in the price, no matter how small, will cause demand for the good to drop to zero.
For instance, in a Cobb-Douglas world with perfectly elastic product demand, the homogeneous labor model predicts that the wage elasticity of immigration will lie between −0.3 (in the short run) and 0.0 (in the long run).
Could the bassline be any more perfectly elastic?
Knowing the initial velocities, the final velocities can be obtained by the simultaneous solution of the momentum and energy equations in the case of perfectly elastic collisions.
In the collision of two perfectly elastic objects, to which billiard balls are a good approximation, momentum and energy are both conserved.
In a perfectly elastic impact (attained only at the atomic level), none of the kinetic energy of the coacting bodies is lost; in a perfectly plastic impact, the loss of kinetic energy is at a maximum.
Earlier Huygens had applied the same principle to the treatment of the problem of collisions, for which he had obtained a definitive solution in the case of perfectly elastic bodies as early as 1656, although his results remained unpublished until 1669.
This model is perfectly elastic without anelastic attenuation.
This model is applicable to perfectly elastic contacts.
The usual idealizing assumptions are made: no friction, perfectly elastic collisions, no outside influences.
