When the road is dry and coefficient of friction is 𝜇, the maximum speed of a car in a circular path is 10 ms−1 . If the road becomes wet and 𝜇 ′ = 𝜇/2, what is the maximum speed permitted?

Question: When the road is dry and coefficient of friction is 𝜇, the maximum speed of a car in a circular path is 10 ms−1 . If the road becomes wet and 𝜇 ′ = 𝜇/2, what is the maximum speed permitted?

(A) 5ms^{-1}

(B) 10ms^{-1}

(C) 10\sqrt{2}ms^{-1}

(D) 5\sqrt{2}ms^{-1}

Answer: option (D)

Solution:

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