QUESTION $1$

Let $m=22kg,=67$deg, and $=0\mathrm{.}56.$

Type the unit, $N,$ after typing your numerical answer.

$1$b$.$ The ladder is uniform, and the wall at $A$ is smooth. Determine the difference between the maximum possible friction force at B and the actual friction force at B$,$ that is$,$ determine

$f_{\text{B}\text{m}\text{a}\text{x}}-f_B$