Fluid Mechanics: Wooden plank floating in water at an angle

[TkoT]

 

[BvU]

Plank has density $\rho = 0.5$. Water has $2\rho$.

I find it much better to use a subscript in such cases: $\rho_{\text {water}}l/\cos\theta$ (plus add an upper limit for $\theta$ for a check later on... )

 

[TkoT]

Plank has density $\rho = 0.5$. Water has $2\rho$.

I find it much better to use a subscript in such cases: $\rho_{\text {water}}l/\cos\theta$ (plus add an upper limit for $\theta$ for a check later on... )

thank you for your help