Abstract
Some balls which are made of high-quality rubber (an elastomeric) material, such as tennisor squash balls, could be used for the determination of an important property of suchmaterials called resilience. Since a bouncing ball involves a single impact we call thisproperty ‘rebound resilience’ and express it as the ratio of the rebound height to the initialdrop height of the ball. We determine the rebound resilience for three different types of ballby calculating the coefficient of restitution of the ball–surface combination from theexperimentally measurable physical quantities, such as initial drop height and time intervalbetween successive bounces. Using these we also determine the contact time of ballswith the surface of impact. For measurements we have used audio, motion andsurface-temperature sensors that were interfaced through a USB port with acomputer.
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