[問題] 位能的條件
最近看書讀到保守場會滿足四個條件
其中四個條件可以互相證明
但有點不太懂其中一個條件
「存在 V(x,y,z) 而且有 E=-▽V,這時候V也稱為位能函數。」
為什麼要特別定義一個函數V,然後取它的梯度在加上負號等於E ?
這樣是有什麼特別的問物理意義或是用意嗎?
想很久還是不懂
懇請板上各位高手解答
感激不盡 >""""<
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