Ferris Wheel physics question?

The London Eye on the south bank of the Thames River (between the Jubilee and Westminster bridges) is one of the largest Ferris wheels in the world1. It has a height of 135 meters and takes about 30 minutes to make one complete rotation. What is the centripetal acceleration of a person inside one of the cars on the rim? What would be the normal force on a 100 kg person at the top? At the bottom? (Would the person notice the change in n?)