Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Directional water pressure?

  1. Sep 22, 2008 #1
    theoritically, if an empty cylinder (say 2 meters diameter) was pushed down 100 meters in the ocean and held there in equilibrium (not moving up or down), and the bottom was cut out, the water would rush up to fill the cylinder to a the same level as the ocean surface. What if there was a bucket of water that was just slightly smaller than the 2 meter diameter of the cylinder (so the water in the cylnder will not escape through over the bucket) lowered into the bottom (100 meters down), and the bottom was removed. Would the pressure of water at 100 meters push the bucket up?? How tall would the bucket have to be (filled with water), to stop the water pressure from pushing the bucket up?

    thanks
     
  2. jcsd
  3. Sep 22, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What would be your guess?
     
  4. Sep 24, 2008 #3
    meaning that the bucket is in the cylinder? and the bucket is "open ended"?
     
  5. Sep 24, 2008 #4
    Yes open at the top to the air.
     
  6. Sep 25, 2008 #5

    Doc Al

    User Avatar

    Staff: Mentor

    Well, what do you think the answer is? From your first post, I think you could hazard a guess. If the ocean could support a column of water 100 m tall, would it really matter that the water is contained in a bucket? (Assuming we can ignore the weight of the bucket itself.)
     
  7. Sep 25, 2008 #6
    well Doc, i guess you are saying the bucket will be 100 meters.
     
  8. Sep 25, 2008 #7

    Doc Al

    User Avatar

    Staff: Mentor

    Yep. Does that make sense to you?
     
  9. Sep 25, 2008 #8
    yes, thanks your time.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Directional water pressure?
  1. Water pressure help (Replies: 3)

  2. Water pressure (Replies: 5)

  3. Water pressure (Replies: 19)

  4. Direction of Pressure (Replies: 6)

Loading...