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2006-12-07 22:28:58 · 14 answers · asked by Eva 1 in Cars & Transportation Boats & Boating

14 answers

This will give you the reasons, in very simple manner

http://www.boatsafe.com/kids/021598kidsques.htm

2006-12-07 22:38:54 · answer #1 · answered by R2 3 · 1 0

Why is the stability of ships so important?
The centre of mass (or centre of gravity) of a body is the point though which its weight acts. For a rigid body such as a ship this is a fixed point relative to the ship — so long as the load does not move about.

The centre of buoyancy is the point through which the buoyancy force or upthrust acts. This however is not a fixed point; it is the geometric centre of the displaced volume of water or, alternatively, the geometric centre of the submerged part of the ship.

As the ship tilts the shape of the displaced body of water changes and the centre of buoyancy moves – usually in the same direction as the tilt. For stability in the water the centre of buoyancy should move further than the centre of gravity. If the load on a ship is stacked very high then the centre of gravity rises; if it becomes so high that it can sway beyond the centre of buoyancy then the ship will be unstable and will easily capsize.

So the distribution the load on a ship is an important factor in its stability. Just as the position of a skater’s arms affects the rate of spinning, the lateral distribution of a ship’s load affects the period of its rolling.

2006-12-07 22:31:47 · answer #2 · answered by Stel 1 3 · 0 2

Here is the easy answer,

All water craft float because the water holds them up.

Sounds silly?

OK, water likes to be in it's own area (lowest possible point) so when we place something in the water the water doesn't want to go uphill, so it pushes on the sides of that something to try and push it out

You may notice, the greater the weight, the greater the width, Greater width equals greater area for the water to push on.

People will tell you a heap about Gravity and Physics (which are all valid) but this is the easiest explanation

Good Luck (Rod)

2006-12-07 22:46:12 · answer #3 · answered by Anonymous · 1 1

the principle of ship is on the basis of "Archiemidies principle "
which is the displacement of water
hull of the ship
material used to build the ship are the reasons why the ship floats....this is also due to the "streamlined structure " as a fish

2006-12-08 00:21:15 · answer #4 · answered by vimalin j 2 · 0 0

A short explanation with graphis can be found here;

http://www.unmuseum.org/exboyant.htm

There are many more explations that can be seen by Googling 'why ships float'

2006-12-08 04:52:59 · answer #5 · answered by Anonymous · 0 0

because of the bounces and design of the ship that is the reason the ship and boats float

2006-12-08 14:14:43 · answer #6 · answered by lake living 5 · 0 1

The hull on the boat makes it float.

2006-12-08 06:01:12 · answer #7 · answered by ? 4 · 0 0

it is because of the SHAPE of the ship.

when a ship is placed in water, its total weight is always less than the weight of the water it displaces - that is why vessels can stay afloat despite being tens of thousands tons heavy with tens of thousands of tons cargo / people onboard

2006-12-07 22:38:32 · answer #8 · answered by GorGeous_Girl 5 · 1 0

its water displacement that make it float . if the water was to enter the ship it would no longer float

2006-12-07 22:50:11 · answer #9 · answered by chotpeper 4 · 0 1

simple physics, displacement of the water and shape of the hull make it float.

2006-12-07 22:37:11 · answer #10 · answered by Ttech 2 · 0 0

Because it weighs less than the amount of water it displaces.

Water is very dense and heavy.

Ships (even if made of iron) are mostly hollow.

Look up "Buoyancy."

2006-12-07 22:39:28 · answer #11 · answered by zen 7 · 1 0

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