Question: three forces fa fb and fc act at point o...
Three forces, FA,
FB, and FC
act at point O. Find the resultant force,
FR, in Cartesian Vector notation,
FA = 120 lbs, θ = 60°, Φ = 50°
FB = 50 lbs, y,z,h = 5,12,13
FC = 110 lbs, α = 120°, β = 80°