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Homework Help: Vector Problems I've been stuck on them 4EVER

  1. Oct 15, 2007 #1
    1. The problem statement, all variables and given/known data

    You are riding on a jet ski at an acute angle upstream on a river flowing with a speed of 2.8 m/s. If your velocity relative to the ground is 9.9 m/s at an angle of 26.0° upstream, what is the speed of the jet ski relative to the water?

    2. Relevant equations

    Pythagorean Theorem, A+B = C in a vector quantity...thats about it

    3. The attempt at a solution

    I set up a right triangle where 9.9 is the hypotenuse, -2.8 is the x component, and im trying to find the Y component. I get the y component by subtracting 9.9 - 2.8 and multiply that value by sin(26). I get 3.11 as the answer.

    Is this right?

    Thank you sooooo much if you can help me I've been stuck on this problem for a very long time.
  2. jcsd
  3. Oct 15, 2007 #2
    som1 please help
  4. Oct 15, 2007 #3


    User Avatar
    Homework Helper

    First examine the:

    9.9 m/s at an angle of 26.0° upstream

    This is the velocity of the jet ski with respect to ground... what is the x-component of this... what is the y-component of this... (ignore the river for now)
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