Question

You are riding on a Ferris wheel that is rotating with a constant speed. The car in which you riding always maintain its correct upwards orientation; it does not invert.
a. What is the direction of the normal force on you from the seat when you are at the top of the wheel?
i. upward, ii. downward, iii. impossible to determine
b. From the same choices, what is the direction of the net force on you when are at the top of the wheel?

Answer 1

a) Since $m(g-a)$ always act downwards normal force $N$ is always upwards.

b) At the top of wheel the net force is $0$ as a result we do not fall down or fly upwards.