The force, power, and energy of the 100 meter sprint
The force, power, and energy of the 100 meter sprint
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DOI：
10.1119/1.3274162
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发表时间：
2009-11
影响因子：
0.9
通讯作者：
O. Helene;M. Yamashita
中科院分区：
文献类型：
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作者：
O. Helene;M. Yamashita
在2008年北京夏季奥运会上，博尔特打破了100米短跑的世界纪录。仅仅一年后，在2009年柏林世界田径锦标赛上，他再次打破了这一纪录。北京峰会结束几个月后，埃里克森等人。J. Phys. 77, 224-228(2009)]研究了博尔特的表现，并预测博尔特本可以跑得快十分之一秒左右，这在柏林得到了证实。在本文中，我们扩展了Eriksen等人的分析，以模拟2008年北京奥运会和2009年柏林奥运会记录中博尔特的速度时间依赖性。我们推导出博尔特在两场比赛中产生的最大力、最大功率和总机械能。令人惊讶的是，我们得出结论，所有这些值在2009年都比2008年小。
At the 2008 Summer Olympics in Beijing, Usain Bolt broke the world record for the 100 m sprint. Just one year later, at the 2009 World Championships in Athletics in Berlin he broke it again. A few months after Beijing, Eriksen et al. [Am. J. Phys. 77, 224–228 (2009)] studied Bolt’s performance and predicted that Bolt could have run about one-tenth of a second faster, which was confirmed in Berlin. In this paper we extend the analysis of Eriksen et al. to model Bolt’s velocity time dependence for the Beijing 2008 and Berlin 2009 records. We deduce the maximum force, the maximum power, and the total mechanical energy produced by Bolt in both races. Surprisingly, we conclude that all of these values were smaller in 2009 than in 2008.