# Motion with Uniform Acceleration - Example 1

Example 1:
An object accelerates from stationary with the acceleration of 4 ms-2. What is the velocity of the object after 7s?

The displacement, s, is not involved, hence we select the equation $$v = u + at$$ to solve the problem. $v=u+at v=(0)+(4)(7) v=28m s −1$
$v=u+at s=ut+ 1 2 a t 2 v 2 = u 2 +2as s= 1 2 (u+v)t$