ANSWER:
116.67 N
STEP-BY-STEP EXPLANATION:
We have that the work formula is the following:
[tex]W=F\cdot d[/tex]Where W is work, F is force, and d is distance. We replace the corresponding values and solve for F to calculate the force, like this:
[tex]\begin{gathered} 1400=F\cdot12 \\ F=\frac{1400}{12} \\ F=116.67\text{ N} \end{gathered}[/tex]The force is equal to 116.67 N