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Homework Help: Convervation Laws

  1. Feb 26, 2008 #1
    1. The problem statement, all variables and given/known data
    In a tennis match, a player wins a point by hitting the ball sharply to the ground on the opponents side of the net. If the ball bounces upward from the ground with a speed of 16m/s and is caught by a fan with a speed of 12 m/s, how high above the court is the fan?

    2. Relevant equations
    Don't know.

    3. The attempt at a solution
    How do I start this question?
  2. jcsd
  3. Feb 26, 2008 #2
    Start with finding out if there is potential gravitational/spring/kinematic enegery at the beginning or at the end.

    [tex]mgh_i + .5m(v_i)^2 + .5k(x_i)^2 = mgh_f + .5m(v_f)^2 + .5k(x_f)^2[/tex]
  4. Feb 27, 2008 #3
    k i'll do that
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