(a) Assume that the Earth is a uniform sphere with a radius r which rotates such that the speed of the ground at the equator is v which is constant. (i) Draw a diagram showing the forces acting on a person standing on the equator. There would be the following forces acting on the person: Gravity (mg) Normal (-mg) Friction at the point of contact to the earth Centripetal force (?) (ii) Explain why a person in this situation must experience a net force even though their speed is constant. Does this have to do with the centripetal force? So they need to have a net force towards the center of the earth?? Any help with these would be greatly appreciated.