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Help with forces

  1. May 30, 2007 #1
    To he who reads this, I’m in desperate need of help with the question I’ve posed below. Although it may seem to be an easy question to you and an utter waste of time, I kindly ask of you to spare a few minutes to enlighten me. Thank you.

    A stone is released into a pond from a height. What are All the Forces which act on the stone?

    This is not my homework. My current Boss posed this question to me. He is probably trying to get the better of me. Do consider helping me. Thank you once again.
  2. jcsd
  3. May 30, 2007 #2
    All forces acting at what point of time and in what environment specifically?
  4. May 30, 2007 #3


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    ok, naturally a few things come to mind immediately about such system: gravitational force (the drop in air and in water, always there), the drag force (air resistance, when moving), reaction force (hitting the water, or buoyancy force)
  5. Jun 4, 2007 #4
    Forces acting at all times... from the time the stone is released to the time it hits the 'pond' bed.
  6. Jun 7, 2007 #5
    released==> graivty(weight) and air resistance

    when partially in water==> weight, air resistance, water resistance, buoyant force

    when completely in water but not touching the bed==> weigth, water resistance, buoyant force

    when touches the bed==> weight, buoyant force, notmal force of the bed

    I assume it does not jump after hitting the bed
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