![]() ![]() The latter effect was investigated by comparing the bounce of a tennis ball with that of a superball. This result can be explained if the ball or the surface stores energy elastically due to deformation in a direction parallel to the surface. Under some conditions, the ball was found to spin faster than this limit. The maximum spin rate of a spherical ball is determined by the condition that the ball commences to roll at the end of the impact. Measurements of all three quantities were made using a digital video camera to film the bounce of a tennis ball incident with zero spin at various angles on several different surfaces. Follow us on Facebook, Instagram, and Subscribe for Daily Updates To Your Mail Box.When a ball is incident obliquely on a flat surface, the rebound spin, speed, and angle generally differ from the corresponding incident values. The coefficient of restitution is a value that is important in determining the nature of a collision, occurring between two bodies.įor More Information and Updates Keep Visiting CRECSO NEWS Magazine. Since variable properties of the tip determine the value of the coefficient, this test does not give an objective result. ![]() The most common test available for determining the value of this coefficient is the Leeb rebound hardness test which uses a tungsten carbide tip that is dropped on an object from a specific height. The coefficient of restitution is not the property of the material of an object because it changes with the object’s shape and the specifics of the collision. This value can be used to study the nature of the objects and determine their uses in various kinds of equipment that could be exposed to collisions.įor example, in car manufacturing industries it can be used to reduce the impact of a collision on the body of a car to prevent too many injuries to the passengers inside. The ratios of the average kinetic energies are used in collision testing for various objects in industrial settings. ![]()
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