Question

A train departs from its station at a constant acceleration of 5 m/s2. What is the speed of the train at the end of 20s?

Answer 1

Variables we're given:

a: acceleration; a = 5 m/s^2

vi: initial velocity; vi = 0 m/s

t: time; t = 20s

Variable we need to solve for:

vf: final velocity

Given these values, we can find the right equation to use.

vf = vi + at

vf = 0 + 5*20

vf = 5*20 = 100

vf = 100 m/s