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A car is negotiating a curved road of ra...

A car is negotiating a curved road of radius R. The road is banked at angle `theta`. The coefficeint of friction between the tyres of the car and the road is `mu_(s)`. The maximum safe velocity on this road is

A

`sqrt((g)/( R ) (mu_(s) + tan theta)/(1-mu_(s) tantheta))`

B

`sqrt((g)/( R^(2) ) (mu_(s) + tan theta)/(1-mu_(s) tantheta))`

C

`sqrt(gR^(2)(mu_(s)+tantheta)/(1- mu_(s) tan theta))`

D

`sqrt(gR(mu_(s)+tantheta)/(1- mu_(s) tan theta))`

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