Question

why are curved roads banked

Answer 1

Explanation:

When a vehicle moves round a horizontal curve on the road with sufficient speed, the necessary centripetal force is provided by the friction between the tyres and the road. So, to increase the centripetal force, friction should be increased which causes wear and tear of the tyres. If the road is banked on the curve, the necessary centripetal force is provided by the horizontal component of normal resistance.

i.e. Fc = Rsinθ

Here, centripetal force can be increased be increasing the angle of banking. So, roads are banked on curved path.

Answer 2

While taking a turn on a horizontal road, the force of static friction between the tyres of the vehicle and road provides the necessary centripetal force.

Explanation:

• ᴍʀᴋ. ᴛʜᴀɴᴋs ᴀɴᴅ ʙʀᴀɪɴʟɪsᴛ