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The maximum frictional force between the tyres of a car and the road is 0.5 mg. The car negotiates a curve of radius 10 metre. The velocity is  

(A) 10 m/s 

(B) 7 m/s 

(C) 4.9 m/s 

(D) 14.2 m/s

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The correct option is (B) 7 m/s.


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