Question

Speeds of two identical cars are u and 4u at a specific instant. The ratio of the respective distances at which the two cars are stopped  from that instant is

(a) 1 : 1

(b) 1 : 4

(c) 1 : 8

(d) 1 : 16

Answer 1

Correct option (d) 1 : 16
Explanation :

In this question, the cars are identical means coefficient of friction between the tyre and the ground is same for both the cars, as a result retardation is same for both the cars equal to μg. Let first car travel distance s₁ before stopping while second car travel distance s₂, then from