A car goes around a curve on a road that is banked at an angle of 30 degrees. Even though the road is slick the car will stay on the road without any friction between its tires and the road when its speed is 24.0 m/s. WHAT IS THE RADIUS OF THE CURVE?
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http://www.batesville.k12.in.us/physics/Phynet/Mechanics/Circular%20Motion/banked_no_friction.htm