http://img241.imageshack.us/img241/9937/78341002sj5.png
唔解最好解釋埋UNDERLINE 左果句 咩意思
不勝感激
Joint variation
2008-05-12 3:55 am
回答 (1)
2008-05-12 5:09 am
✔ 最佳答案
F 正比 M 和m反比 d平方
可寫成 F = kMm/d^2
由題設得 F = kMm/d^2 = k(1.21M)(0.81m)/D^2
(D/d)^2 = 1.21X0.81=0.9801
D/d = 0.99
距離減小了1%
收錄日期: 2021-04-25 16:40:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080511000051KK02438