Determine the maximum angle $\backslash$alpha with the vertical that the

ladder can make without falling on the ground.

$\backslash$alpha $=$

A ladder is leaning against a vertical wall, and both ends of

he ladder are at the point of slipping. The coefficient of static

friction between the ladder and the horizontal surface is

u$\_(1)=0\mathrm{.}265$ and the coefficient of friction between the ladder

and the wall is $\backslash$mu $\_(2)=0\mathrm{.}153.$