A boat in zero gravity : would it sink? - Contractor UK Bulletin Board

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AlfredJPruffock replied

18 June 2009, 15:07
Originally posted by PerlOfWisdom View Post

If the sea were in a void in the middle of a planet then it would be weightless but could still have an atmosphere to stop it boiling or freezing. The boat would be attracted to the centre by the sea's own weak gravity, but being a boat, would be less dense than water so would not sink.

You assume that the sea had to consist of water - for example on Titan lakes are Methane rather than Water - at very low termperatures Methane exists as a liguid as it does on Titan.
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Pinto replied

18 June 2009, 15:03
Originally posted by Churchill View Post

A ship will float when the weight of the water it displaces is less than or equal to the weight of the ship.

Originally posted by Churchill View Post

Read what I posted. What didn't you understand?

The weight of the water it displaces should be more not less than the weight of the ship?
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Drewster replied

18 June 2009, 14:43
Originally posted by Churchill View Post

What's equal to Mass * Accelleration?

May "it" be with you....
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Churchill replied

18 June 2009, 14:38
Originally posted by Pinto View Post

I thought it was the other way round. For it to float, the ship must weigh less than the amount of water it displaces.

Read what I posted. What didn't you understand?
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Pinto replied

18 June 2009, 14:31
Originally posted by Churchill View Post

A ship will float when the weight of the water it displaces is less than or equal to the weight of the ship.

I thought it was the other way round. For it to float, the ship must weigh less than the amount of water it displaces.
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Churchill replied

18 June 2009, 14:30
Originally posted by Drewster View Post

In zero gravity - I agree!!

I on the other hand am worth my mass in Gold!

And I really thought we were getting along swimmingly.

What's equal to Mass * Accelleration?
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Drewster replied

18 June 2009, 14:21
Originally posted by Churchill View Post

I'm worth my weight in gold!

In zero gravity - I agree!!

I on the other hand am worth my mass in Gold!
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Churchill replied

18 June 2009, 14:20
Originally posted by Drewster View Post

A CUK Eureka moment!!!!!

I'm worth my weight in gold!
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Drewster replied

18 June 2009, 14:18
Originally posted by Churchill View Post

A ship will float when the weight of the water it displaces is less than or equal to the weight of the ship.

A CUK Eureka moment!!!!!
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Churchill replied

18 June 2009, 14:14
Originally posted by PerlOfWisdom View Post

If the sea were in a void in the middle of a planet then it would be weightless but could still have an atmosphere to stop it boiling or freezing. The boat would be attracted to the centre by the sea's own weak gravity, but being a boat, would be less dense than water so would not sink.

A ship will float when the weight of the water it displaces is less than or equal to the weight of the ship.
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PerlOfWisdom replied

18 June 2009, 13:28
If the sea were in a void in the middle of a planet then it would be weightless but could still have an atmosphere to stop it boiling or freezing. The boat would be attracted to the centre by the sea's own weak gravity, but being a boat, would be less dense than water so would not sink.
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DimPrawn replied

17 June 2009, 18:01
Christ on a bike.

I just made up this thread for fun and look at you guys!

If only you all applied your intellect to your work you'd be rich.
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RichardCranium replied

17 June 2009, 17:57
Originally posted by AlfredJPruffock View Post

Planck is now approaching L2.

... being delivered right into the hands of the aliens lurking there in their black space ship.

It's all part of Zeity's Grand Plan.
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Fred Bloggs replied

17 June 2009, 17:53
Originally posted by TimberWolf View Post

Second law of thermodynamics: the entropy of a system always increases. The boat would sink, but in no particular direction. That is, the system would tend to randomness, the boat being buffeted by water molecules from all sides: sunk.
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TimberWolf replied

17 June 2009, 17:08
Originally posted by Fred Bloggs View Post

To sink, you need a force pushing the boat down through the water.

Force = Mass x Acceleration.

No Gravity = No acceleration, therefore no force, so it cannot sink. HTH.

Second law of thermodynamics: the entropy of a system always increases. The boat would sink, but in no particular direction. That is, the system would tend to randomness, the boat being buffeted by water molecules from all sides: sunk.
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