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Homework Help: Speed of sound homework

  1. Sep 14, 2008 #1
    1. A soccer player kicks a rock horizontally off a 40.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.00 s later, what was the initial speed given to the rock? Assume that the speed of sound in air is 343 m/s.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Sep 14, 2008 #2


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    Homework Helper

    Re: Help!

    You really have to try something or express some idea about the problem before we can help. You must know a kinematic equation that describes a falling body.
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