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Homework Help: Hang glider velocity question

  1. Oct 11, 2006 #1
    The altitude of a hang glider is increasing at a rate of 6.75 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 17.0 m/s when the sun is directly overhead. Find the magnitude of the glider's velocity.

    I drew this diagram all out and I still cannot understand the concept of this. I don't understand...I could figure this out if I was given an angle at wihch the hang glider was traveling...but since Im not i do not know how to figure this out. Where can I start??? any help please??
  2. jcsd
  3. Oct 11, 2006 #2


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    Effectively, you have been given both the vertical and horizontal velocity. That is all you need. Knowing both of these, you could find the angle if you needed to.
  4. Oct 11, 2006 #3
    AH thanks I didnt need the angle but that got me to thinking about how to get it and i realized to use pythagorean theorem. THANKS!
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