For the stake of Prob. 2.5, knowing that the tension in one rope is 120 N, determine by trigonometry the magnitude and direction of the force P so that the resultant is a vertical force of 160 N. Problem 2.5 A stake is being pulled out of the ground by means of two ropes as shown. Knowing that a = 30, determine by trigonometry (a) the magnitude of the force P so that the resultant force exerted on the stake is vertical, (b) the corresponding magnitude of the resultant. Fig. P2.5 120 N 25