作者graddivcurl (为所应为)
看板Physics
标题Re: [问题] 离心机离心力和rpm的关系～
时间Thu Mar 6 14:39:50 2008
※ 引述《a00raso (安安)》之铭言：
: 想要知道离心机的rpm和离心力大小(几g)之间的关系～～
: 我找到网路上面的资料公式是：
: G＝1.11＊10^(-5)＊R＊(rpm)^2
: R的单位是cm
: 不过就是推算不出来这个式子＠＠
: 还是这只是实验出来的结果～
: 无法用理论去计算？
: 谢谢～～
(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!
P.S. In fact, the question of this sort was asked about two years ago, and I
replied to it at that time
--
" I was born not knowing and have only had a little time to change that
here and there" --- Richard P. Feynman
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