Q. The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called _____.
Answer: banking of roads
Notes: The phenomenon of raising outer edge of the curved road above the inner edge is to provide necessary centripetal force to the vehiclesto take a safer turn and the curved road is called Banking of Roads. If a car is on a level (unbanked) surface, the forces acting on the car are its weight, mg, pulling the car downward, and the normal force, N, due to the road, which pushes the car upward. Both of these forces act in the vertical direction and have no horizontal component. If there is no friction, there is no force that can supply the centripetal force required to make the car move in a circular path - there is no way that the car can turn.