Banked Roads Curves on roads often are banked to help prevent cars from slipping off the road. If the
speed limit for a particular curve of radius 36.0 m is
15.7 m/s (35 mph), at what angle should the road be
banked so that cars will stay on a circular path even
if there were no friction between the road and the
tires? If the speed limit was increased to 20.1 m/s
(45 mph), at what angle should the road be banked?