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Total resistive force question.

  1. Jun 2, 2015 #1
    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!:wink:
     
  2. jcsd
  3. Jun 2, 2015 #2
    It's correct. The masses are irrelevant.
     
  4. Jun 2, 2015 #3
    Okay, Thank you!
     
  5. Jun 2, 2015 #4
    I think that 140kW is the total power. So is ok.
     
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