JAMB - Physics (2013 - No. 5)
A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2m-2. The time required to bring the train to a complete halt is?
5s
10s
20s
40s
Giải thích
t = \(\frac{v - u}{a}\) = \(\frac{0 - 20}{-2}\) = 10s