A 2000 kg car moves over a hill at a constant speed of 12.0sm. At the very top of the hill, the shape of the road can be approximated as a circle with radius 25 m, as indicated in the figure. Which one of the following choices best represents the magnitude of the upward force exerted by the road on the car? (Use g=10.0s2m)
[Figure: Car on top of circular hill with radius labeled]
(A) 0 kN (B) 8.5 kN (C) 11.5 kN (D) 20.0 kN (E) 31.5 kN