Question

Why do roads on mountains have inward inclination at sharp turn

Answer 1

here the concert of banking of roads come. when on mountain, a sharp turn comes, there to increase the centripetal force and to keep the body inward, the inclination is given inward.

Answer 2

Explanation:

When the vehicle is moving in the straight path, it requires friction between tire and car to move.

When the vehicle is moving in the mountain road, the same friction acts but when there is a sharp turn, it requires friction with the centripetal force (force which is required to keep an object in circular path).

The vehicle should be in the tangent to have a safe journey, thus to prevent the car from skidding or moving off tangent, the road in inclined in inward direction.  

If there are no inward inclination, then the vehicle may fall from the mountain.