2007-07-18 08:21:05 · 10 answers · asked by Rock God 2 in Cars & Transportation ➔ Boats & Boating
Displacement, floatation, and buoyancy. Any object, solid or hollow, will float if the volume of water that it displaces weighs more than the object itself. I copied from the web
2007-07-18 08:27:17 · answer #1 · answered by Catfish 1 · 1⤊ 0⤋
Do you see a green bar at the top called "Search for questions"? Why you don't use that? Its really annoying to answer on this question every week, u know.
Boats float because of displacement.
In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place, so that it can be weighed.
An object that sinks also displaces an amount of fluid equal to the object's volume. Thus buoyancy is expressed by Archimedes' Principle which states that when this happens, the weight of the object is reduced by its volume times the density of the fluid. If the weight of the object is less than this quantity, it will float, if more it will sink. The amount of fluid displaced is directly related (via Archimedes' Principle) to its weight.
Displacement is used as a measure of the weight of ships (see: Hull (watercraft), load line and Stability conditions (watercraft). The displacement of a vessel is equal to the weight of water it displaces when afloat.
Vessels such as naval ships and icebreakers are often measured by their displacements. The unit of measure can be long tons or metric tons depending on the country of origin. The ship can be measured in light condition, fully loaded, or normal (usually fully loaded, but with about two-thirds of fuel and unconsumables). For official purposes, the Washington Naval Treaty introduced the standard displacement, which was the displacement fully loaded but with no fuel or reserve feed water.
2007-07-18 23:36:47 · answer #2 · answered by Damon_ru 3 · 0⤊ 0⤋
The hollow shape of the hull makes the combined weight of the boat lighter than the water it displaces.
Fiberglass is heavier than water, just not quite as heavy as metal.
Both will sink without the proper shape.
2007-07-18 15:33:54 · answer #3 · answered by gejandsons 5 · 0⤊ 0⤋
Because there is still the same amount of water pushing up on the hull that's equal to the displacement and weight of the boat.
2007-07-18 08:27:45 · answer #4 · answered by Saddler 3 · 0⤊ 0⤋
Take a five gallon bucket an try an push it down in the water Thats how a boat works only bigger.
2007-07-18 17:04:00 · answer #5 · answered by 45 auto 7 · 0⤊ 0⤋
They displace more weight in water than they weigh themselves. At SDSM+T they make canoes from concrete and they float fine.
2007-07-18 08:27:44 · answer #6 · answered by Anonymous · 2⤊ 0⤋
Fiberglass
2007-07-18 08:25:48 · answer #7 · answered by JT B ford man 6 · 0⤊ 2⤋
there made out of fiberglass thats why they float and the design of them
2007-07-18 15:29:19 · answer #8 · answered by Alex R 1 · 0⤊ 1⤋
because the water they displace has more mass than the boat.
it's called Archimedes' principle of buoyancy.
2007-07-18 08:29:34 · answer #9 · answered by Anonymous · 2⤊ 0⤋
we won w/w2 with the liberty ship and it was made of concrete,go figure!
2007-07-18 13:20:09 · answer #10 · answered by Anonymous · 0⤊ 0⤋