A Ferris wheel is a vertical, circular amusement ride with radius 8.5 m. Riders sit on seats that swivel to remain horizontal. The Ferris wheel rotates at a constant rate, going around once in 7.3 s. Consider a rider whose mass is 73 kg.
a. At the bottom of the ride, what is the vector gravitational force exerted by the Earth on the rider?
b. At the top of the ride, what is the rate of change of the rider's momentum?
c. At the top of the ride, what is the vector gravitational force exerted by the Earth on the rider?
d. At the top of the ride, what is the vector force exerted by the seat on the rider?