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Coefficient of restitution for bouncing nanoparticles
Physical Review B, 2010We demonstrate the measurement of the coefficient of restitution, $e$, for nanoparticles, through observations of the final distribution of bismuth particles that have bounced within silicon V-grooves. The experiments, taken together with complementary molecular-dynamics simulations, show that $e$ is generally smaller for liquid than for solid ...
A. I. Ayesh +5 more
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Evaluation of Rockfall Restitution Coefficients
2015Restitution coefficients for various slope surfaces affected by extensive rockfalls are proposed from back–analysis calculations that have been carried out in several sites of the Western Greece. These occurrences have been thoroughly studied in order to investigate the extent of the events, assess the hazard and propose protective measures.
N Sabatakakis, N Depountis, N Vagenas
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Work equivalent composite coefficient of restitution
International Journal of Impact Engineering, 2004For collisions between hard bodies that have dissimilar material properties, a composite coefficient of restitution (COR) can be calculated if, for each body, the material properties and COR values for self-similar collisions are known. The composite COR represents the energy dissipated during a collision between materially-dissimilar bodies.
J. Coaplen, W.J. Stronge, B. Ravani
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Investigations of the Restitution Coefficient of Granules
2008The energy adsorption during the normal and oblique impacts of different spherical granules (γ-Al2O3, zeolite 4A, sodium benzoate) has been experimentally studied. Free-fall tests have been carried out to obtain the normal and tangential restitution coefficients that characterise the energy losses durizng loading and unloading.
Müller, Peter +3 more
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Simulation Modelling of Coefficient of Restitution [PDF]
, 2022 This article discusses types of mills, used to reduce the size of grinding materials. An analysis of methods for determining the restitution coefficient was made, after that a method for determining the restitution coefficient was chosen. Input parameters have been experimentally determined, enabling proper modeling and simulation.
Stoimenov, Nikolay +3 more
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Stochastic behavior of the coefficient of normal restitution
Physical Review E, 2014We consider the collision of a rough sphere with a plane by detailed analysis of the collision geometry. Using stochastic methods, the effective coefficient of restitution may be described as a fluctuating quantity whose probability density follows an asymmetric Laplace distribution. This result agrees with recent experiments by Montaine et al.
Nina, Gunkelmann +2 more
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Watching and listening to the coefficient of restitution
The Physics Teacher, 2011Abstract We discuss the measurement of the coefficient of restitution (COR) and the acceleration of gravity g using video and sound analysis with both Tracker and Logger Pro 3 software. Measuring COR of a bouncing ball is a common activity in physics labs from high school to intro level college courses (e.g., measuring COR to obtain gravitational ...
Marco Ciocca, Jing Wang
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Listening to the coefficient of restitution
American Journal of Physics, 1977A pedagogical method is described for measurement of the coefficient of restitution for collisions between a bouncing ball and a horizontal surface. Indirect measurement using only the sound made by the bouncing ball facilitates the rapid collection of data, allowing introductory laboratory students more time to concentrate on theory, method, data ...
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Coefficient of restitution mediated by a diamagnetic interaction
The European Physical Journal E, 2016We study how a magnetic bead bounces onto a horizontal diamagnetic conducting plane. The bead, falling down by gravity from a certain height, produces an Eddy current that creates a repelling force. For low velocities the bead is trapped by the surface, for intermediate ones it escapes.
A J, Batista-Leyva, J C, Ruiz-Suárez
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Measurement of coefficient of restitution made easy
Physics Education, 2005We present a simple activity that permits students to determine the coefficient of restitution of bouncing balls using only a stopwatch, a metre stick and graphical analysis. The experiment emphasizes that simple models, in combination with careful attention to how students make measurements, can lead to good results in a straightforward way.
N Farkas, R D Ramsier
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