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:
