Question

Why are roads banked at turning?

Answer 1

Hint : Banking of the roads can be defined as the phenomenon in which the edges are raised for the curved roads which are above the inner edge to provide the necessary centrifugal force. The angle at which the vehicle inclined is known as the bank angle.

Complete Step By Step Answer:
The banking of the road is the process of raising the outer edge of the road over its inner edge through a certain angle.
The banking of the road is necessary since when the vehicle moves along the horizontal curved road which is necessary for the centripetal force to supply by the force which is between the wheels of the vehicle and the surface of the road.
Since, the road becomes oily or wet in the rainy season and the frictional force is not enough and reliable every time with the change and therefore, to increase the centripetal force the should be made rough. These rough roads may create wear and tear of the tyres of the wheel.
Also, due to the lack of the centripetal forces the vehicles tend to slide.
Therefore, when the road is banked, the horizontal component of the normal reaction provides the necessary centripetal force which is required for the circular motion of the vehicle.

Note :
To provide the centripetal force at the curved paths of the road, the banking of the road is very necessary. It gives safe negotiation to the curved roads to the vehicles moving with the speed.