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A ship's center of stability is known as the metacentre. If you add weight to the side of a ship the moment created will cause it will roll. There has to be a restoring moment otherwise the ship will capsize. This restoring moment is due to the change in the submerged volume, hence change in center of buoyancy. This acts at the 'center of stability' where BM(distance from center of buoyancy to metacenter) = Inertia/Displacement
Picture a model of a yacht with a large weight attached to the mast. Now move the weight onto the keel. Which one do you think has the best stability?
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What is the center of buoyancy?
The center of buoyancy is the center of volume of displaced water of the hull (of a vessel). Gravity pulls down on a floating object. The fluid it is floating on pushes it up and it floats (assuming it is bouyant). Both gravity and bouyancy (the two forces at work) will have an effective center. The center of gravity is not required to be lower than the center of bouyancy and in general most ship's center of gravity is above the center of bouyancy. The ship will heel until the Metacenter (which is a function of the actual Waterplane area) is at or above the center of gravity. It might be advantageous to look at the center of gravity with respect to the center of bouyancy in ship hull stability and thereby get a better grasp of the particulars. Use the link below to our friends at Wikipedia and look at some diagrams concerning the stability of ships in terms of where the centers of bouyancy and gravity are in relation to each other.
Why is it that maximum stability occurs when the metacenter is above the center of buoyancy?
metacentre is above centre of buoyancy to ensure the rightning lever or uprightning moment is in the same direct of the ships heeling that will tend to make the ship upright
Explain the effect in stability in ships when tank is partially filled with liquid?
It makes the ships center of gravity sink lower in the water. This makes the ship more stable by making it less top heavy and by displacing more water. It gives it a larger base. Hooweestik.
What does center of gravity have to do with stability?
Centre of gravity of a body is defined as the fixed point in the body through which the weight of the body would act in whatever position the body is kept. Hence if the CG is at higher point of the body then there will be more chances for falling or toppling. Because earth would always attract the body towards its centre. Hence as CG is at the lowest level as possible then the stability would increase. Hence in case of ships the CG will be maintained to be at most bottom so as to avoid toppling.
What causes a ships iron anchor to sink to the ocean?
Gravity causes the ships iron anchor to sink to the ocean.
What are the determining factors in a ships seaworthiness?
stability
What has the author R F Scheltema de Heere written?
R. F. Scheltema de Heere has written: 'Buoyancy and stability of ships' -- subject(s): Hydrodynamics, Ships, Stability of ships
What has the author H J Pursey written?
H. J. Pursey has written: 'Merchant ship stability' -- subject- s -: Merchant ships, Stability of ships
What has the author John Anthony Hind written?
John Anthony Hind has written: 'Automation in merchant ships' -- subject(s): Automation, Merchant ships, Ships 'Stability and trim of fishing vessels for skippers & second hands' -- subject(s): Fishing boats, Stability of ships
Why bottom of ship made heavy?
The bottom of a ship is made heavy to lower the ship's center of gravity and increase stability. This helps prevent capsizing and improves the ship's overall seaworthiness in rough seas. Additionally, the weight at the bottom provides ballast to counterbalance the weight of cargo and equipment on board.
Why does a ship not sink?
ships do not sink because gravity pushes it up
Why did the ships in the Spanish armada sailed in a half moon shape?
The ships in the Spanish Armada sailed in a half moon shape in order to form a defensive formation. This allowed them to protect the more vulnerable ships in the center of the formation and prevent the enemy from breaking through the lines. It also enabled the Spanish to use their superior firepower from the broadsides of their ships.
