posted by jessica .
On a banked race track, the smallest circular path on which cars can move has a radius r1 = 106 m, while the largest has a radius r2 = 153 m, as the drawing illustrates. The height of the outer wall is 18 m.
Find the smallest speed at which cars can move on this track without relying on friction.
) Find the largest speed at which cars can move on this track without relying on friction.