QUESTION 1 Four forces (measured in Newtons) act on a crate. The forces are given by the vectors F = -2911 - 219+ 170k N, F = 1351 + 180 + 120k N, F3 = 3801 - 171+228k N, and F4 = -350k N. (a) What is the resultant, R = F+F2 + F3 + F4, of the four forces? What is the magnitude of the resultant force? (b) If the displacement of the crate is given by d = 31 - 7+ 8.7km what is the contribution by the first force F to the work done i.e. W = F. d? (e) If the third force, F3, acts at the point (3.4,-0.6,0.5) m, what is the moment, M = rx F3, at the point (-0.6, 1.2, 0.5) m? (d) What is the angle (in degrees rounded to one decimal place) between the force vectors F2 and F3? (e) What is the force vector, F, that acts in the opposite direction to the force F2 and has magnitude of 170 newtons?