Answer:
12.25 m/s
Explanation:
If a car slows down at -5 m/s2 and it comes to a stop after traveling 15 m we just have to use the next formula:
[tex]Vf^{2} =Vo^{2} +2ad[/tex]
Now we know that the final velocity is 0, so by inserting our data into the formula it would look like this:
[tex]Vf^{2} =Vo^{2} +2ad[/tex]
[tex]0 =Vo^{2} +2(-5m/s^{2})(15m)[/tex]
[tex]-Vo^{2}= -150m^{2}/s^{2}[/tex]
[tex]Vo^{2}= 150m^{2}/s^{2}[/tex]
[tex]Vo= \sqrt{150m^{2}/s^{2}}[/tex]
[tex]Vo= 12.25m/s[/tex]
