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Homework Help: Vibration plataform

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data

    A vibration platform oscillates up and down with an amplitude of 10.4 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts to clatter?

    2. Relevant equations

    I need to know how to start this problem and what equations to use

    3. The attempt at a solution
  2. jcsd
  3. Sep 25, 2008 #2


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    Homework Helper

    Hi gonzalo12345! :smile:

    This is like a roller-coaster problem … the rock will lose contact when the platform is accelerating downward so fast that the rock cannot fall fast enough to keep up!

    So work out the maximum acceleration of the platform (it will depend on frequency, obviously). :smile:
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