Thread: Re-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

please can anyone help ?

if the link doesnt work then please let me know

Originally Posted by raldam

please can anyone help ?
if the link doesnt work then please let me know

I would like to try to help you.
But, I will not open that file.
Are you not able to type out the question?

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

-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 ?

You need to learn to use LaTeX

If it
[TEX] -200\left(r-\frac{0.42r}{\sqrt{r^2+(0.3)^2}}\right)=-108r [/TEX] is the above code.

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

Originally Posted by raldam

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

If then that reduces to

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

ignore the previous elementary question, Iv obtained my value for r

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

thanks

rob