1. The problem statement, all variables and given/known data - FBD of description of forces - Mass of the rider ( is to decide ) = 70 kg - Dimensions of the Ride ( is to decide ) Height = 10 meters Radius = 10 meters Givens: gmax= 4 g Speed of bike = 80 Km/h Mass of Bike = 180 kg mu= vertical coefficient of friction = 1.00 Find: Minimum speed to keep rider on wall Maximum based on gmax 2. Relevant equations Centripetal Acceleration (ac)= V2/ Radius Fc= m.ac = m. 4pi^2* Radius/ T^2 3. The attempt at a solution mtotal= 250 kg ( 180 + 70 ) speed of bike in meters = 22.22 m/s mT*g = direction= downwards= 2452.5 N [Down] So far this is what I have done for attempt. I'm not asking to do this question. 1) direction of forces..Fg would be down. Normal force?? and what provides the centripetal force. 2) If you can help me do this question.