The maximum speed with which a car is driven round a curve of radius 18 m without skidding (where, g =10ms −2 and the coefficient of friction between rubber tyres and the roadway is 0.2) is

Question : The maximum speed with which a car is driven round a curve of radius 18 m without skidding (where, g =10ms −2 and the coefficient of friction between rubber tyres and the roadway is 0.2) is

(A) 36.0kmh^{-1}

(B) 18.0kmh^{-1}

(C) 21.6kmh^{-1}

(D) 14.4kmh^{-1}

Answer : option (C)

Solution :

The maximum speed with which a car is driven round a curve of radius 18 m without skidding (where, g =10ms −2 and the coefficient of friction between rubber tyres and the roadway is 0.2) is
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