# 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) $5\sqrt{2}ms^{-1}$