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```        bankimg of roads
problems related to pulley```
8 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										Dear shilpa,
Banking of Roads:When vehicle go through  turnings, they travel along a nearly circular arc. There must be some  force to produce the required centripetal acceleration. Centripetal  force is provided to the vehicle by following three ways.

By friction only

By friction and banking of roads both.

1) By  friction:       Let a car of mass m is moving at a speed v is at horizontal circular arc  of radius r.        And fL=  limiting value of f = N = mg       (N=mg)For a  safe turn without sliding, So if m and r is fixed the speed of the vehicle  should not exceed and if v and r is fixed then coefficient of  friction should be greater than 2) By banking of  roads only:To avoid friction  outer part of road is some what lifted compared to the inner part.  Fig (29)From figure (29)  NSin =  and  NCos = mg From this we get, Tan =  At two speeds car  does not slide down even if track is smooth.

All the best.
Win exciting gifts by                 answering the questions on Discussion Forum. So help     discuss     any       query   on askiitians forum and become an Elite     Expert   League      askiitian.

Sagar Singh
B.Tech, IIT Delhi

```
7 years ago
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