Determine the magnitude of the resultant force F_R = F_1 + F_2. Assume that F_1 = 276 lb and F_2 = 400 lb. Express your answer to three significant figures and include the appropriate units. Determine the direction of the resultant force F_R. measured counterclockwise from the positive x axis. Express your answer to three significant figures and include the appropriate units. Show transcribed image text