JAMB - Physics (2016 - No. 23)
A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2ms-2. The time required to bring the train to a complete halt is
40s
10s
20s
5s
解释
t = \(\frac{v - u}{a}\) = \(\frac{20 - 0}{2}\)
= 10s
= 10s