ANSWER:
16 N
STEP-BY-STEP EXPLANATION:
The force is given by the multiplication of the mass and the acceleration, like this:
[tex]\begin{gathered} f=m\cdot a \\ m=2.5\text{ kg} \\ a=6.4\frac{m}{s^2} \end{gathered}[/tex]We repalce and calculate the force, like this:
[tex]\begin{gathered} f=2.5\cdot6.4 \\ f=16\text{ N} \end{gathered}[/tex]The force is 16 newtons