We have the next data
vi=initial velocity=34.6 m/s
a=acceleration=-3.5 m/s^2
t=time=3s
we need to find the final velocity (vf)
We will use the next formula
[tex]a=\frac{vf-vi}{t}[/tex]
then we substitute the data
[tex]-3.4=\frac{vf-34.6}{3}[/tex]
then we isolate the vf
[tex]vf=-3.4(3)+34.6[/tex][tex]vf=-10.2+34.6[/tex]
[tex]vf=24.4\text{ m/s}[/tex]
the velocity of the car after 3 seconds is 24.4 m/s
