作者graddivcurl (為所應為)
看板Biology
標題Re: [問題] 請問rpm與g之換算
時間Mon Sep 18 13:23:15 2006
※ 引述《[email protected] (高義！你真他媽的雜碎)》之銘言：
: ※ 引述《[email protected] ( )》之銘言：
: 請問...能用物理離心力公式推導出此方程是嗎？
: 我用 F＝V^2/R (V＝2ΠR/T)去推算
: 不論怎麼單位換算 就是算不出下面公式 XD
: 請大大幫幫忙^^
: > g = (1.118 * 10^-5) * R * S^2
(1) Because rpm is revolution(s) per minute,
rpm = (w/(2Pi))*60 where w is radian/sec
Thus, w=(Pi/30)*rpm
(2) a=rw^2 (because a=(v^2)/r, & v=rw)
(3) RCF (relative centrifugal force) is defined as
RCF= (a/g)= (rw^2)/980 = {r[(Pi/30)*rpm]^2}/980
=1.119* 10^(-5) * (rpm)^2 * r
done!
--
" An expert problem solver must be endowed with two incompatible
qualities ─ a restless imagination and a patient pertinacity"
--- Howard W. Eves
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.128.65.230
1F：推 Phaeton:對嘛 是1.119阿... 134.208.24.35 09/18 15:11