阿基米德說，給我一個支點，他可以撐起整個地球，那麼該支點有否需要計算它可以受多少的力呢？
可否告訴我計算方法呢？
槓桿問題—支點問題
2009-07-08 2:42 am
回答 (2)
2009-07-08 8:00 am
✔ 最佳答案
力臂(力點到支點距離)X施力(你要施的力)=抗力臂(抗力點到支點距離)x抗力(地球的質量)
2009-07-08 4:33 am
Yes, the point of support (i.e. the pivot) needs to be strong enough to withstand the weight of the earth and the force used to raise the earth (i.e. the effort).
This is simply a matter of balance of forces. The reation at the pivot equals to the weight of the earth and the effort.
This is simply a matter of balance of forces. The reation at the pivot equals to the weight of the earth and the effort.
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