Answer:
[tex]F=F_{f}=1171.5 N[/tex]
Explanation:
We know that the sailboat has a uniform movement, therefore the total force, the engine, and the wind must be equal to the friction force.
[tex]F=F_{f}[/tex]
[tex]F=F_{f}=\sqrt{F^{2}_{engine}+F^{2}_{wind}}[/tex]
[tex]F=F_{f}=\sqrt{900^{2}+750^{2}}[/tex]
[tex]F=F_{f}=1171.5 N[/tex]
Therefore the friction force is 1171.5 N.
I hope it helps you!
