Delayed rebounds in the two-ball bounce problem

Bartz, Sean P.

doi:10.1088/1361-6404/ac5384

Cited by 3 publications

(3 citation statements)

References 26 publications

(37 reference statements)

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“…As for the design of air circuit structure of air pressure perfusion, this research has high requirements for supplementing and unloading air pressure, which not only requires the control accuracy of proportional solenoid valve but also has corresponding requirements for the design structure of air circuit. After repeated tests, select the appropriate air pipe diameter and cylinder volume [ 10 , 11 ]. The structure of pneumatic circuit is shown in Figure 2 .…”

Section: Athlete Training Monitoring Systemmentioning

confidence: 99%

Study on Strength and Quality Training of Youth Basketball Players

Meng

2022

Computational and Mathematical Methods in Medicine

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In order to scientifically explore the effective path of strength quality training of basketball players and improve the effect of strength quality training of basketball players, this paper takes young basketball players as the research object and comprehensively observes the changes and improvement of strength quality by building a strength training monitoring system for basketball players. On this basis, it is proposed to integrate blood flow restriction and basketball players’ special strength training. Through the comparison with the traditional resistance strength training method, it is found that after 8 weeks of experimental comparison, the athletes’ strength quality test indicators show that the average 3RM of the experimental group 1 bench press is 65.2 kg, the experimental group 2 is 65.7 kg, and the experimental group 3 is 72.2 kg. The average performance of the traditional control group was 55.4 kg. Compared with the traditional group, the average performance of the three experimental groups in bench press was significantly improved, which also verified the feasibility of this method in strength quality training.

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Section: Athlete Training Monitoring Systemmentioning

confidence: 99%

Study on Strength and Quality Training of Youth Basketball Players

Meng

2022

Computational and Mathematical Methods in Medicine

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“…These results suggest that models of collisions of multiple spheres should account for impact velocity dependence when the lower ball is in contact with the floor and gravity is present [3,14,15,16]. These results may also be relevant for modeling granular materials under gravity or another driving force, [17] while gas models typically lack such a driving force [18] and can neglect this effect.…”

Section: Discussionmentioning

confidence: 81%

Coefficient of restitution of a linear dashpot on a rigid surface

Bartz¹

2022

Preprint

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The linear dashpot model is applied to a single ball bouncing on a rigid surface. It is shown that when gravity is included the coefficient of restitution depends on impact velocity, in contrast to previous work that ignored the effects of gravity. This velocity dependence is most pronounced at low impact velocities and high damping. Previous work has considered the ball to be in contact with the floor when the compression is nonzero, while other analysis terminates the collision earlier, to prevent an attractive force. We compare these models and propose a hybrid between the two. The hybrid model is successful in reproducing experimental results for a cart bouncing repeatedly on a spring.

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“…A student should learn that this is an important check when building a new model, and that one should use the simpler model when working in its domain of validity. These results suggest that models of collisions of multiple spheres should account for impact velocity dependence when the lower ball is in contact with the floor and gravity is present [9,[22][23][24]. These results may also be relevant for modeling granular materials under gravity or another driving force [25], while gas models typically lack such a driving force [26] and can neglect this effect.…”

Section: Discussionmentioning

confidence: 82%

Gravity effects in mass-spring-damper models of inelastic collisions

Bartz¹

2023

Eur. J. Phys.

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A ball bouncing on a rigid surface is modeled as a mass-spring-damper system. We consider the effect of including or neglecting the force of gravity, extending previous work that shows that including gravity yields a velocity-dependent coefficient of restitution. This velocity dependence is most pronounced at low impact velocities and high damping. Previously-published models differ in defining the termination of the collision, with some referencing the ball's position and others noting when the contact force becomes zero. We propose a new model that combines aspects of these approaches. The various models are compared in their predictions for the coefficient of restitution and collision duration, and are compared to experimental data from a cart on an inclined track bouncing repeatedly on a spring. While the new model shows some improvement over the prior collision termination conditions, the inclusion of gravity is the more important consideration in modeling repeated bouncing.

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Delayed rebounds in the two-ball bounce problem

Cited by 3 publications

References 26 publications

Study on Strength and Quality Training of Youth Basketball Players

Study on Strength and Quality Training of Youth Basketball Players

Coefficient of restitution of a linear dashpot on a rigid surface

Gravity effects in mass-spring-damper models of inelastic collisions

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