The final velocity is of the car is 35[tex]ms^{-1}[/tex].
Explanation:
The car initially moves in the velocity 20 [tex]ms^{-1}[/tex]. It then accelerated by 3[tex]ms^{-2}[/tex] for 5 seconds.
The formula to find final velocity, [tex]v_f=v_i+a(t).[/tex]
[tex]v_i[/tex]: initial velocity of the car.
a: acceleration rate.
t: time.
[tex]v_f[/tex]: final velocity
From the given information,
[tex]v_i[/tex]= 20[tex]ms^{-1}[/tex].
a=3[tex]ms^{-2}[/tex].
t= 5s.
[tex]v_f[/tex]=20+3(5).
=20+15.
=35[tex]ms^{-1}[/tex].
∴The final velocity of the moving car is 35[tex]ms^{-1}[/tex].
