Problem 2 (35 pts) A walkway for loading and unloading ships at a wharf is shown.  The elevation of the walkway is controlled by cable BCD which is attached to a drum on a motor at B.  A 1000 lb force is applied vertically at location C. a.) Draw a free body diagram of bar AB including motor B. b.) Determine the tension in cable BCD (lb).

R_A_y = 

c.) Determine the magnitude of the moment of force F about line AB (N-mm).

M_z =

c.) Determine the moment vector produced by the 400 N force about point A (N-m). M_x = 

r_AC_y = 

M_A_y = 

Problem 1 (40 pts) The massless bar AB has a cable attached to one of its ends and a fixed collar at its other end.  The collar has a square hole that fits loosely around a fixed square rod at point A, allowing it to slide without friction. There are two external forces acting on the bar as shown.  The 400 N force is parallel to the z axis and the 200 N force if parallel to the y axis. a.) Carefully draw a free body diagram of the bar AB. b.) Determine a unit vector that is in the direction BC. u_BC_x =

u_BC_y =

Which medication the PMHNP would prescribe for a 8-year-old girl who presents with severe depression? (think about FDA approval)