Sinking rock

  1. If a rock is sinking in water with constant speed..

    how many forces are working on it?
     
  2. jcsd
  3. berkeman

    Staff: Mentor

    What are *your* thoughts? What is the context of your question?
     
  4. my thoughts are that there are only two; gravity and water resistance, but my physics book says its three; gravity, water resistance AND buoyancy. i don't understand how buoyancy works in this situation... anyone?
     
  5. A.T.

    A.T. 6,286
    Science Advisor
    Gold Member

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