Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Types of Impact01:30

Types of Impact

652
Impacts can be classified in various forms, primarily under two subgroups: central impact and oblique impact. A central impact occurs when two objects collide head-on, possessing opposite velocities aligned along the line of impact. Conversely, an oblique impact occurs when two objects collide at an angle, resulting in a modification of both direction and velocity.
The coefficient of restitution is a metric for understanding the dynamics of impacts. It quantifies the ratio of relative velocity...
652
Work Done During Volume Change01:17

Work Done During Volume Change

4.3K
In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process.
Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr.
The work done by the gas on the piston can be expressed as
4.3K
Motion of a Projectile01:23

Motion of a Projectile

1.2K
Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
1.2K
Impact01:30

Impact

196
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
196
Impulse01:13

Impulse

19.2K
According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
Additionally, it can be shown that the...
19.2K
Conservation of Linear Momentum for a System of Particles01:28

Conservation of Linear Momentum for a System of Particles

274
In the dynamic realm of billiards, a fascinating interplay of forces governs the motion of cue balls and stationary balls. When the cue ball collides with a stationary ball, linear momentum is exchanged. The cue ball imparts a fraction of its linear momentum to the stationary ball, causing the cue ball to decelerate while initiating the motion of the stationary ball.
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
274

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Is the diagnostic performance of FFRangio affected by coronary microvascular dysfunction?

Cardiovascular revascularization medicine : including molecular interventions·2026
Same author

Comparison of next-morning residual effects by bedtime administration of vornorexant and zopiclone in healthy older participants: postural stability, neuropsychological functions, and subjective sleepiness in a randomized clinical study.

Psychopharmacology·2026
Same author

Impact of trial exclusion criteria on real-world comparative effectiveness of targeted therapies in rheumatoid arthritis: the FIRST Registry.

RMD open·2026
Same author

Real-world effectiveness, safety and patient-reported outcomes of sarilumab in patients with rheumatoid arthritis: a 52-week, prospective, open-label, non-interventional, observational, nationwide, large-cohort study in Japan (PROFILE-J).

RMD open·2026
Same author

Serious injury prediction in motor vehicle crashes: a nonlinear modeling approach using trainable B-spline functions.

Traffic injury prevention·2026
Same author

Treatment patterns, treat-to-target goals and clinical outcomes of patients with active lupus nephritis: real-world evidence from a multicentre cohort study.

Arthritis research & therapy·2026

相关实验视频

Updated: Sep 12, 2025

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data
06:14

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

6.6K

足球协会中降低球膨胀压力是否会降低头部冲击动力学?

Rory England1, Suzie Liverseidge2, Yusuke Miyazaki3

  • 1Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK. r.england@lboro.ac.uk.

Annals of biomedical engineering
|August 5, 2025
PubMed
概括
此摘要是机器生成的。

降低足球通胀压力可以降低头部冲击动力学,但它

关键词:
脑损伤是因为脑损伤.退行性大脑健康 退行性大脑健康足球 足球 足球 足球头部冲击的影响.头部受伤的原因是头部受伤.标题 标题 标题伤害生物力学受伤生物力学足球 足球 足球

更多相关视频

Modified Drop Tower Impact Tests for American Football Helmets
07:08

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

11.1K
A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
07:30

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

9.0K

相关实验视频

Last Updated: Sep 12, 2025

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data
06:14

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

6.6K
Modified Drop Tower Impact Tests for American Football Helmets
07:08

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

11.1K
A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
07:30

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

9.0K

科学领域:

  • 运动生物力学运动生物力学
  • 神经学 神经学
  • 预防伤害的预防.

背景情况:

  • 球与大脑健康问题有关.
  • 了解头部撞击动力学对于球员的安全至关重要.
  • 降低球膨胀压力是一种潜在的干预策略.

研究的目的:

  • 评估降低膨胀压力在足球比赛中减轻头部动力学方面的有效性.
  • 为了研究撞击位置,头部方向,部曲和球类型对这种干预的影响.

主要方法:

  • 一个混合III头模型与两种现代足球受到冲击.
  • 撞击在正面和斜面位置使用专门的发射装置进行.
  • 在两个球膨胀压力下分析了峰值线性和角加速,峰值角速度和DAMAGE指标.

主要成果:

  • 90%的撞击显示动力学幅度下降或不变,平均下降率为2-12%.
  • 在大多数情况下,降低的膨胀压力有效降低了线性加速,角速度和角加速.
  • 然而,10%的撞击显示动力学幅度增加,特别是对DAMAGE度量.

结论:

  • 降低球膨胀压力是降低足球中头部撞击动力学的一般有效方法.
  • 这种干预并不普遍有效,因为一些影响,特别是那些通过DAMAGE度量分析的影响,显示了动力学增加.
  • 撞击位置,头部方向和球类型显著影响降低膨胀压力的有效性.