Problem $1$:

A $2-$D general force system acts on the beam, $P=100lb,m=400lb-ft($ m is a couple$)$ and

unknown forces $Ax,Ay,By\mathrm{.}1$ If the moment of all the forces and $m$ about A is zero, determine

the magnitude of force By and direction $($up or down$)$; $2)$ If the moment of all the forces and $m$

about B is zero, determine the magnitude of force Ay and direction $($up or down$).$ Use $Mp=\frac{+}{-}$

Fd scalar form for $2$D cases