ANSWER
[tex]\begin{equation*} 1.96\text{ }m\/s^2 \end{equation*}[/tex]EXPLANATION
We want to find the resulting acceleration of the object.
To do this, we apply the formula for the net force acting on the object:
[tex]F_{net}=ma[/tex]where Fnet = net/total force acting on the object
m = mass
a = acceleration
The net force is the sum of the applied force and the frictional force (which is negative):
[tex]\begin{gathered} F_{net}=F+(-F_r) \\ \\ F_{net}=F-F_r \end{gathered}[/tex]Substitute that into the equation for net force and solve for a:
[tex]\begin{gathered} F-F_r=ma \\ \\ a=\frac{F-F_r}{m} \\ \\ a=\frac{6.9-1.8}{2.6} \\ \\ a=1.96\text{ }m\/s^2 \end{gathered}[/tex]That is the acceleration.
