Hi guys I've been doing a dynamics problem and I am currently on the last little bit.

Could someone please help me re-arrange this equation to make r the subject

see attached

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- Mar 4th 2013, 06:20 AMraldamRe-arranging formula
Hi guys I've been doing a dynamics problem and I am currently on the last little bit.

Could someone please help me re-arrange this equation to make r the subject

see attached - Mar 4th 2013, 07:38 AMraldamRe: Re-arranging formula
please can anyone help ?

if the link doesnt work then please let me know - Mar 4th 2013, 07:41 AMPlatoRe: Re-arranging formula
- Mar 4th 2013, 07:44 AMraldamRe: Re-arranging formula
Yer is there anyway to insert an equation, theres a few brackets, square roots and divides to type out and its difficult using the typical keyboard and people will probably get confused.

thanks

raldam - Mar 4th 2013, 07:47 AMraldamRe: Re-arranging formula
-200(r-0.42r/√(r^2+〖0.3〗^2 ))=-108r

iv tried to copy and paste an equation from word, if that makes any sense to you ? - Mar 4th 2013, 08:08 AMPlatoRe: Re-arranging formula
You need to learn to use LaTeX

If it $\displaystyle -200\left(r-\frac{0.42r}{\sqrt{r^2+(0.3)^2}}\right)=-108r $

[TEX] -200\left(r-\frac{0.42r}{\sqrt{r^2+(0.3)^2}}\right)=-108r [/TEX] is the above code. - Mar 4th 2013, 08:10 AMraldamRe: Re-arranging formula
arr ryt thanks for that, well yes that is the equation that I need to try and re-arrange to make r the subject.

I've been trying for ages and keep getting complex formula, I keep getting the feeling though that it is quite simple - Mar 4th 2013, 08:20 AMPlatoRe: Re-arranging formula
- Mar 4th 2013, 08:22 AMraldamRe: Re-arranging formula
thanks for your help its much appreciated, but is that the furthest it can reduce to ?

from the equation you posted is there anyway to obtain a value for r ?

thanks - Mar 4th 2013, 09:36 AMraldamRe: Re-arranging formula
ignore the previous elementary question, Iv obtained my value for r

if you could, could you explain how you simplified the expression ?

thanks

rob