2007-04-18 06:40:41 · 14 answers · asked by LISA A 1 in Cars & Transportation ➔ Boats & Boating
Weight and Buoyancy
Weight is the force due to gravity acting on the mass of the boat.
Buoyancy is the force due to the displacement of water by the boat.
The boat floats at the point where the mass of water displaced is equal to the mass of the boat.
2007-04-18 11:13:36 · answer #1 · answered by Neil 7 · 4⤊ 0⤋
Upward forces = downward forces.
Upward force is buoyancy - caused by the pressure of the medium (water, say) to want to return to where it started (level). The denser this medium, the greater the pressure and hence the greater the buoyancy (vessels float higher in salt water then in fresh because it is more dense).
Downward force is the weight of the vessel - caused by its mass x acceleration due to gravity.
The point at which these two forces equalize or become stable, is the point at which the object floats. If they don't equalize, then the object sinks - but the upward forces are still acting on the submerged object, so under the surface of the medium it's weight is less than above the surface. (Though it's mass is still the same).
2007-04-21 04:47:33 · answer #2 · answered by Girly Brains 6 · 0⤊ 0⤋
Weight and buoyancy.
Weight is the mass of the boat mutiplied by acceleration due to gravity (about 9.81m/s/s at sea level)
Buoyancy is practically the weight of the water the boat is displacing.
The two must be in equilibrium, which is why a laden boat sits lower in the water than an unladen one.
2007-04-18 10:55:23 · answer #3 · answered by Anonymous · 2⤊ 0⤋
Buoyancy is the upward force. Displacement is the term used for the downward force.
2007-04-18 10:08:01 · answer #4 · answered by science teacher 7 · 2⤊ 0⤋
The upward force is buoyancy, the center of the force is "KB'
The downward force is gravity, the center of that force is "CG".
When KB and CG are in line the vessel is said to be in equilibrium. When they are no longer centered you get your list and trim( a fore and aft list)
2007-04-19 02:56:35 · answer #5 · answered by T C 3 · 1⤊ 0⤋
LCG - longitudiunal center of gravity -- forces hull down
LCF - longitudinal center of floatation - forces hull up
2007-04-19 03:41:47 · answer #6 · answered by mainsailorus 4 · 0⤊ 0⤋
One is called a wife, the other is a paycheck.
2007-04-21 16:07:02 · answer #7 · answered by chuck l 2 · 0⤊ 0⤋
Well I ain't to shore but my grampy always used gee and hah on his old mules so I reckon thatted work on a boat two.
2007-04-18 07:35:46 · answer #8 · answered by litscot 3 · 0⤊ 3⤋
it is boency and balance or boincy and gravity one of the 2
2007-04-21 10:55:46 · answer #9 · answered by jelly bean 1 · 0⤊ 1⤋
buoyancy and water displacement
2007-04-18 06:47:53 · answer #10 · answered by auntnebakenezer 2 · 0⤊ 1⤋