1. The problem statement, all variables and given/known data #2 Two people pull on a stubborn mule, as seen from a helicopter in Figure 1. Find (a) the single force that is equivalent to the two forces shown, and (b) the force that a third person ould have to exert on the mule to make the net force equal to zero. Figure 1: the blue on the left and right, represent for a person. #3 A car travels due east with a speed of 50km/h. Rain is falling vertically with respect to the Earth. The traces of the rain on the side windows of the car make a angle of 60* with the vertical. Find the velocity of the rain with respect (a) the car and (b) the Earth. 2. The attempt at a solution I am totally got no idea with the problem #1. Can you guys give me some hints or help me please? #2 Is this right right picture for the problem ?