0
Twoply

Why a ship doesn't sink

Recommended Posts

A ship pushes the same amount of water away as it sinks into the water as it weighs. If this happens before the decks are reached then hoorah! if not then poopie.

The boat stays afloat as the water is trying to fill this void that the ship creates in it pushing against it.


------
Two of the three voices in my head agree with you. It might actually be unanimous but voice three only speaks Welsh.

Share this post


Link to post
Share on other sites
Quote

What's the rule as to ships floating? It's something like a ship only displaces the volume of water that is equal to the ship's weight above water level or something like that? Who knows what the right answer is?


Essentially the water pressure pressing on the sides and bottom of the ship will cause as much buoyancy as the volume of water it displaces. If you add more weight, the ship sinks deeper and displaces more water, if you take weight away, the ship will float higher and displace less water...

Share this post


Link to post
Share on other sites
Yes the ship is pushed up with a force equal with the G force of the displaced volume of water. You will find this force not only in water but rather in every fluid. Another trick used for ships is to have most of the weight of the ship under the water so that the center of gravity is lower the the center of the force that is pushing up. This create stable equilibrium. Much like a good arch where the center of pressure is higher than the center of gravity so you are stable.

I believe that Archimedes was the 1st dude to find that force but I might be wrong. The force itself it is easily explained by the difference of pressure between the top area and bottom area of a solid body that is sink inside a fluid. I remember that I failed physic once because of this subject[:/][:/][:/].

Here is a demonstration:
http://www.youtube.com/watch?v=KyrPbSPJe_I

Can someone make it a clicky?
What are you "sinking" about?;);););)

edit: to add more smiles and a demonstration.
Lock, Dock and Two Smoking Barrelrolls!

Share this post


Link to post
Share on other sites
Is this like the thing where I had to make a boat out of Play-doh and the teacher dropped marbles in it until it sank and whosever's boat held the most marbles got like a star on their Hootie card or something?

:P

I came in third place, by the way. And I didn't have a clue what I was doing. I just made a super-cute boat.B|
Paint me in a corner, but my color comes back.

Share this post


Link to post
Share on other sites
Quote

Is this like the thing where I had to make a boat out of Play-doh and the teacher dropped marbles in it until it sank and whosever's boat held the most marbles got like a star on their Hootie card or something?

:P

I came in third place, by the way. And I didn't have a clue what I was doing. I just made a super-cute boat.B|








:)










~ If you choke a Smurf, what color does it turn? ~

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

0