作者graddivcurl (为所应为)
看板Biology
标题Re: [问题] 请问rpm与g之换算
时间Mon Sep 18 13:23:15 2006
※ 引述《[email protected] (高义！你真他妈的杂碎)》之铭言：
: ※ 引述《[email protected] ( )》之铭言：
: 请问...能用物理离心力公式推导出此方程是吗？
: 我用 F＝V^2/R (V＝2ΠR/T)去推算
: 不论怎麽单位换算 就是算不出下面公式 XD
: 请大大帮帮忙^^
: > 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!
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