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範例:空氣阻力作功與功能定理

如右圖，將質量為100 g的小球自高度為20公尺的A點以18 m/s的初速斜拋出去，落回地面時的速率為20 m/s，求空氣阻力所作的功。


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Posted in 重力位能.

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By admin – 2009 年 04 月 15 日

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