File:Rolling Racers - Moment of inertia.gif
Rolling_Racers_-_Moment_of_inertia.gif (480 × 270像素,文件大小:1.6 MB,MIME类型:image/gif、循环、126帧、4.2秒)
说明
说明
描述Rolling Racers - Moment of inertia.gif |
The objects are, from back to front:
At any moment in time, the forces acting on each object will be its weight, the normal force exerted by the plane on the object and the static friction force. As the weight force and the normal force act on a line through each object's center of mass, they result in no net torque. However, the force due to friction acts perpendicular to the contact point, and therefore it does result in a torque, which causes the object to rotate. Since there is no slipping, the object's center of mass will travel with speed Solving for Since the torque is constant we conclude, by Newton's 2nd Law for rotation Where, v0 = 0 and d is the total distance traveled. Therefore, we have: For a ramp with inclination θ, we have sin θ = h / d. Additionally, This final result reveals that, for objects of the same radius, the mass the object are irrelevant and what determines the rate of acceleration is the geometric distribution of their mass, which is represented by the value of k. Additionally, we observe that objects with larger values of k will accelerate more slowly. This is illustrated in the animation. The values of k for each object are, from back to front: 2/3, 2/5, 1, 1/2. As predicted by the formula found above, the solid ball will have a larger acceleration, reaching the finish line first. |
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日期 | ||||
来源 | 自己的作品 | |||
作者 | Lucas Vieira | |||
授权 (二次使用本文件) |
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其他版本 | OGG Theora Video: small and [[:File:Rolling Racers - Moment of inertia (HD).ogv|large (HD) and for classroom educational purposes a static image of the finish at File:Rolling Racers - Moment of inertia Photofinish.jpg ]] |
POV-Ray source code
[编辑]Available at the video version's description page.
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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当前 | 2021年6月16日 (三) 21:01 | ![]() | 480 × 270(1.6 MB) | TomFryers(留言 | 贡献) | Improve render quality and increase resolution and framerate slightly |
2012年12月23日 (日) 03:10 | ![]() | 444 × 250(1.49 MB) | LucasVB(留言 | 贡献) | {{Information |Description=... |Source={{own}} |Date=2012-12-23 |Author= Lucas V. Barbosa |Permission={{PD-self}} |other_versions=OGG Theora video }} |
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