the projection of vector AB on force F is: Proy = lABlcos (theta) We have then: lABl = root ((5) ^ 2 + (2) ^ 2) lABl = root (25 + 4) lABl = root (29) Substituting: Proy = root (29) * cos (30) Proy = root (29) * (root (3) / 2) Then, the work carried out will be: W = F * d W = 180 * (root (29) * (root (3) / 2)) W = 839 Answer: W = 839 option A
