Did I Neglect the Skier in the Resistive Force Calculation?

[Userxy]

Hi,
Imagine a boat with a skier behind it (connected with a rope).

Mass of boat=2000Kg
Mass of skier=80Kg
At 20m/s the boat engine has a power output of 140kW

Calculate the total resistive force.

Power=FxV
140000W=Fx20m/s
F=7000N

Is the answer right ? I doubt my answer, even if its really easy, because I totally neclected the skier.

Thanks!

 

[Paul Eccles]

It's correct. The masses are irrelevant.

 

[Userxy]

It's correct. The masses are irrelevant.

Okay, Thank you!

 

[theodoros.mihos]

I think that 140kW is the total power. So is ok.