※ 引述《pap641217 (Plain&AttractivePhysics)》之銘言：
: 以下四小題題目，皆假設整個系統為在置底之磅秤上，而在
: 不同過程與與系統總重量來比較
: 球在光滑碗中自由下滑過程 磅秤讀數較系統 輕或重？？
let M be the bowl mass, ball mass m.
because the ball act on the bowl perpendicularly, its magnitude N,
and N=mg cost.
the down-side component is N cost= mg cos^2t
where t=0 when the ball in the lowest.
the digit on the weight machine is Mg+mg cos^2t less than Mg+mg
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◆ From: 112.104.115.89
※ 編輯: JohnMash 來自: 112.104.115.89 (09/28 18:15)
※ 編輯: JohnMash 來自: 112.104.88.136 (09/28 19:31)