Problem $4-13$

Determine the moment about point $B$ of each of the three forces acting on the beam.

Units Used:

kip :$={10}^{3}Ib$

Given:

$F_1$:$=375lb,d$:$=0\mathrm{.}5ft$

$F_2$:$=500lb,$:$=30$deg

$F_3$:$=160lb,e$:$=4$

$a$:$=8ft,f$:$=3$

$b$:$=6ft,$

$c$:$=5ft,$