Answer to Question #37670 in Electric Circuits for noor

Question

Suppose the skateboarder shown in the drawing reaches a height of 2.20 m above the right side of the semicircular ramp. He then makes an incomplete midair turn and ends up sliding down the right side of the ramp on his back. When the skateboarder reaches the bottom of the ramp, his speed is 6.20 m/s. The skateboarder's mass is 53.0 kg, and the radius of the semicircular ramp is 2.60 m. What is the average frictional force exerted on the skateboarder by the ramp?