A worker is raising a $5\mathrm{.}05-m-$long ladder of mass $89$ kg as shown. Knowing $a=1\mathrm{.}01m$ and that the force exerted by the worker is perpendicular to the ladder, determine:

$($a$)$ the force exerted by the worker

$($b$)$ the reaction at $B.$

You may also want to practice the graphical method, which is probably more difficult for this problem.

$F$ woker $=$

$N$

$64\mathrm{.}18$

$-$

$FatB=\sqrt[\phantom{2}]{461\mathrm{.}7486}N$

$64\mathrm{.}19$

$64\mathrm{.}19$