A 55 kg skateboarder is moving down a ramp with a 5.0 m radius of curvature. If at the bottom of the ramp he reaches a speed of 8.0 m/s, what is the upward force acting on him when he is at the bottom of the ramp?

• A. 1000 N
• B. 1100 N
• C. 1200 N
• D. 1300 N

Answer: (C)