posted by Amy .
At a picnic, there is a contest in which hoses are used to shoot water at a beach ball from three different directions. As a result, three forces act on the ball, F1, F2, and F3. The magnitudes of F1 and F2 are F1= 50.0 N and F2 = 90.0 N. F1 acts under an angle of 60 degrees with respect to the x-axis and F2 is directed along the x-axix. Find the magnitude and direction of F3 such that the resultant force acting on the ball is zero.