For the system shown to the right:

a$)$ Compute the magnitude of the couple.

$M=Fd$

$M=(160)(2)$

$m=-320lbft$

b$)$ Calculate the net moment acting about point $B.$

${\displaystyle \underset{?}{\overset{?}{}}}MB=(2401b)(4ft)+(200lb)(7ft)$

$=2360lbft$

The member shown below is subjected to a force of $6kN$ at an angle $=50.$ Compute the moment about point $A.$

If the $70N$ force acts on the pipe at an angle of $60,$ determine the moment about point $A.$