Abstract

The total bouncing time of hardened steel balls released from given heights above the practically plane surfaces of hardened steel anvils of limited size has been measured at room temperature. The coefficient of restitution is very little different from unity in the sensibly elastic region of deformation in which the heights of fall of the sphere plotted against the corresponding total bouncing times lie on a parabola. The multiple rebounds sufficiently integrate the small energy loss, so that the well reproducible total bouncing time varies measurably when the coefficient of restitution is altered by an exceedingly small amount.

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