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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決 
關於重力向量場的問題
Aug 6th 2013, 12:47

我只是猜猜已
由數學的角度想, 
F(r) = -km(r-r0) / (|r-r0|^3) = -km (R) /(|r-r0|^2)
R = (r-r0)/|r-r0|  是 (r-r0) 的unit vector, 指示力的方向, 
-km/(|r-r0|^2) 則指示力的值 (magnitude)

我想, 與距離二次成反比的, 其實是重力的"值"

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