Three forces, f1=75n, f2=100n, f3=80n, are applied to the
rigidbracket a, b,c, d. f3 is at a 45 degree angle and f1 is at a
30degree angle from the horizontal. determine the magnitude
anddirection of the moment of:
a) f1 about point b in nm
b) f2 about point b in nm
c) f3 about point b in nm
d) determine the sum of the moments of the three forces about
pointd.