$2\mathrm{.}35$ Knowing that $=35,$ determine the resultant of the three fo shown.

Fig. P$2\mathrm{.}35$

$2\mathrm{.}36$ Knowing that the tension in cable $BC$ is $725$ N $,$ determine the resu tant of the three forces exerted at point $B$ of beam $AB.$

$2\mathrm{.}37$ Knowing that $=40,$ determine the resultant of the three force shown.

The double pulley shown is attached to a $10-$mm$-$radius shaft that fits loosely in fixed bearing. Knowing that the coefficient of static friction kinetic friction betwee the shaft and the poorly lubricated bearing are ${}_s=0\mathrm{.}35$ and ${}_k=0\mathrm{.}40$ respectiv determine the magnitude of the force $P($a$)$ to just start raising the block $(20kg)$ an $($b$)$ to lower the block $(20kg)$ at a constant rate. Note: Neglect the weight of the pulleys.