Answer: [tex]26\ \frac{m}{s}[/tex]
Explanation:
His new velocity is the "Final velocity". In order to calculate it, you need to use the following formula:
[tex]V_f=V_0+at[/tex]
Where [tex]V_f[/tex] is the Final velocity, [tex]V_0[/tex] is the Initial velocity, [tex]a[/tex] is the acceleration and [tex]t[/tex] is the time.
Based on the information provided in the exercise, you can identify that:
[tex]V_0=18\ \frac{m}{s}\\\\a=4\ \frac{m}{s^2}\\\\t=2\ s[/tex]
Therefore, you can substitute values into the formula:
[tex]V_f=18\ \frac{m}{s}+(4\ \frac{m}{s^2})(2\ s)\\\\V_f=26\ \frac{m}{s}[/tex]
Then, his new velocity is [tex]26\ \frac{m}{s}[/tex]
