Originally Posted by

**Raezputin** Hi there, I am new to the forums so I hope I am posting this in the right spot. I am studying Physics but seem to be hitting a roadblock when doing some more complicated fractions. I am sure that once I see it I will understand but would appreciate any help! I will list the two problems I am working on, thanks!

Problem 1:

Trying to solve for $\displaystyle F_{f}$!

$\displaystyle

\frac {1}{P} = \frac {F_{f}}{P_{f}} + \frac {1 - F_{f}}{P_{L}}

$

Problem 2:

Trying to reduce!

$\displaystyle mgsin\Theta - \frac {mgsin\Theta}{1 + \frac {I_{c}}{MR^2}} = 0$