## Questions 7-8
An ant of mass m clings to the rim of a flywheel of radius r, as shown above. The flywheel rotates clockwise on a horizontal shaft S with constant angular velocity ω. As the wheel rotates, the ant revolves past the stationary points I, II, III, and IV. The ant can adhere to the wheel with a force much greater than its own weight.
8. What is the magnitude of the minimum adhesion force necessary for the ant to stay on the flywheel at point III?
(A) mg
(B) mω2r
(C) mω2r2+mg
(D) mω2r−mg
(E) mω2r+mg