Question

An olympic.class sprinter starts a race with starts an acceleration of 4.50m/s². what is her speed 2.40s later?

Answer 1

The final speed of the car

$$v_f=v_i+at$$

$$v_f=0\:\rm m/s+4.50\:\rm m/s^2\times 2.40\:\rm s=10.8\:\rm m/s$$