If a Lamborghini, with an initial velocity of 5 m/s, accelerates at a rate of 40 m/s/s for 2.5 seconds, what will its final velocity be?

Question

a = vf – vi vf = vi + at t = vf-vi

            t     a  

My teacher gave me these formulas and im not sure which one it is or even how to do this

the F's are supposed to be small

Answer 1

You are give an initial velocity, an acceleration and a time that acceleration is applied. You are looking for the final velocity. So the equation that works is:

v_f = v_i + at

v_f = 5 + 40(2.5) = 5 + 100 = 105 m/s