A teenager and his skateboard have a total mass of 80 kg. He is moving at 7.5 m/s on frictionless ice and grabs a rope suspended from a park pole as shown in the diagram, and hangs on. His speed remains the same as he goes into a circular turn of radius 5 m, with the rope at a 30o angle from the horizontal. The tension of the rope is the only force responsible for his circular motion, since he is on ice during the circular motion. With what force in Newtons does his skateboard press down on the smooth, level ice? (Answer: 264 N)