Originally Posted by **feenon** sorry having problems with the format
it is X squared
feenon |

Okay so if I've got you right you have

$\displaystyle E_S = \frac{1}{2}K_Sx^2$

and you want the units for $\displaystyle K_S$.

So

$\displaystyle K_S = \frac{2E_S}{x^2}$

In terms of units then

$\displaystyle \frac{J}{m^2} = \frac{N~m}{m^2} = \frac{N}{m}$

$\displaystyle = \frac{kg~m/s^2}{m} = \frac{kg}{s^2}$

-Dan