Answer:
50 meters
Explanation:
Let's start by converting to m/s. There are 3600 seconds in an hour and 1000 meters in a kilometer, meaning that 72km/h is 20m/s.
[tex]v_f=v_o+at[/tex]
Since the car starts at rest, you can write the following equation:
[tex]20=0+a(5) \\\\a=20\div 5=4 m/s^2[/tex]
Now that you have the acceleration, you can do this:
[tex]d=v_o+\dfrac{1}{2}at^2[/tex]
Once again, there is no initial velocity:
[tex]d=\dfrac{1}{2}(4)(5)^2=2 \cdot 25=50m[/tex]
Hope this helps!
