A car goes on a horizontal circular road of radius R. The speed increases at a constant rate a=dv/dt. The friction coefficient between the tyre and road is μ. What is the speed at which the car will skid?
a. [(μ²g²−a²)R²]¹/⁴
b. [(μ²g²−a²)R]¹/⁴
c. (μg−a)R²
d. (μg−a)R⁴
