Kinetic energy depends on the height of an object above the ground?

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Which changes of state do the labels represent? a: b: c:

What’s #16 asking and how do i solve it?