JEE Main Physics question
A car starts from rest to cover a distance s. The coefficient of friction between the road and the tyres is μ. The minimum time in which the car can cover the distance s is proportional to
Answer: (D)
Solution
Maximum acceleration available = μg. s = ½(μg)t² ⟹ t = √(2s/μg) ∝ 1/√μ.