A train with an initial velocity of 20m/s¹ is subjected to a uniform deceleration of 2ms−². The time required to bring the train to a complete halt is?

A. 40s
B. 10s
C. 20s
D. 5s

Correct Answer:

Option B – 10s

Explanation

t = v−u/a
= 20−0/2

= 10s