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Tension in and out of water in constant velocity

  1. Jul 13, 2014 #1
    A crane lifts the 18,000-kg steel hull of a ship out of the water at constant velocity.

    (A) Determine the tension in the crane’s cable when the hull is submerged in the water.


    (B) Find the tension when the hull is completely out of the water.

    I would have thought that B would just be the weight, but apparently that was wrong. And how do you find the amount of water displaced when the hull is submerged? I was thinking maybe A is the weight minus the displacement?

    Thanks in advance for any help!!
     
  2. jcsd
  3. Jul 13, 2014 #2

    haruspex

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    Your answer to B looks right to me. What's your reason for saying it's wrong?
    I agree with your answer to A too.
     
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