While performing your amazing juggling act at the circus, you stand on a platform that is 5 meters above the ground. You accidentally let a ball slip and throw it with velocity vo upward. Meanwhile, a clown simultaneously begins sliding from rest down a frictionless slide, as shown in the figure. Both your ball and the clown reach the ground at the same time, and both are moving at a final speed of 15m/s (but in different directions). See the figure. What is the angle of incline of the clown's slide? (Note: the slide is not necessarily 5 meters tall). ?? 5m