Problem $3$:

A foot valve for a pneumatic system is hinged at $B.$ Knowing that $=30,$ determine the

moment of the $16-N$ force about point B by resolving the force into horizontal and vertical

components.

Problem $4$:

Consider the same setup as diagrammed in Problem $3$ above. Determine the moment of the $16-N$

force

a$)$ About point $B,$ and

b$)$ About point C

By resolving the force into components along ABC and in a direction perpendicular to ABC $.$