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Find amplitude of a membrane

  1. Oct 30, 2005 #1
    hi, this is the last question i'm having trouble with.. the question is:

    Fine sand is sprinkled on the horizontal membrane, which vibrates in the vertical direction with frequency f = 500 Hz. The sand particulates bounce at the height of 3 mm over the level of the position of equilibrium of the membrane.
    What is the amplitude of the membrane’s vibration?

    I imagine that as each sand particulates hits the membrane, the membrane would vibrate for several seconds, and it would be much lower in amplitude than the height sand bounces.. However, I don't have a clue currently how to go about finding that specific amplitude.. Can someone give me a clue as where to begin?

    Thank you very much :smile:
  2. jcsd
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