When the speed of a car is v , the minimum distance over which it can be stopped is x . If the speed becomes n v and the stopping time is kept the same, the minimum distance over which it can be stopp

Question

When the speed of a car is v , the minimum distance over which it can be stopped is x . If the speed becomes n v and the stopping time is kept the same, the minimum distance over which it can be stopped is:

TestHub · Accepted Answer

With the same stopping time t : a 1 ​ = t v ​ and a 2 ​ = t n v ​ = n a 1 ​ . From v 2 = 2 a 1 ​ x and n 2 v 2 = 2 a 2 ​ x ′ = 2 n a 1 ​ x ′ , dividing gives x ′ = n x . Option B.

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