I have tried this problem multiple times without success. Please provide a full solution. Thanks! A local circus act features a motorcycle rider inside a hollow sphere. He accelerates his bike to a maximum velocity in order to allow himself to be able to drive parallel to the ground inside the sphere. The sphere has an inner diameter of 8.00m, the motorcycle and rider have a mass of 250kg and his tires have a coefficient of static friction of 0.80 with the inside surface of the sphere. What is the minimum speed he must attain in order to keep from falling inside the sphere?