How d boats float?

Question

i was just wondering how do boats float with all of the weight inside?

Answer 1

displacement, it pushes the water away and it holds it up the more displacement the bigger the boat

Answer 2

Buoyancy is the upward force on an object produced by the surrounding liquid or gas in which it is fully or partially immersed, due to the pressure difference of the fluid between the top and bottom of the object. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body. This force enables the object to float.  

If you add too much weight, people or cargo, the boat will displace more water, freeboard will decease to zero (0) and the vessel will now sink.

An object, or boat, can displace water and still sink.  A boat can have poor stability and still float, at least in calm waters.

Answer 3

Archimedes' principle does it . It floats exactly the way it does.

Answer 4

simple - Surface Tension.

Water molecules sticking together - like when they form a rain drop. Surface tension keeps it from disbursing into a million fragments.

Your boat is pushing down on the surface of the water with a force equal to the weight of the boat.

The surface of the water is pushing up on the boat with a force equal to the weight of the water that the boat is displacing (about 67 pounds per cubic foot).

As the boat enters the water and pushes down, it displaces (pushes out of the way) more and more water.

When it reaches the point to where the water it has displaced weighs the same as the boat, it stops sinking, and floats at that depth.

Answer 5

A boat, or any other object designed to float, is based on a theory by a very old guy, even older than Capt. Matt. Though he is old and, by the way, dead, he was really a cool guy and his name was Archimedes . His principle, cleverly named the Archimedes' Principle, explains how things float.

If you fill your bathtub with water, what happens when you get in? The water rises, right? (And sometimes goes over the side.) That is because you "displaced" some of the water with your body and it had to go somewhere. The key to floating is that the object must displace an amount of water which is equal to its own weight.

For example, suppose you had a block of wood that was 1 foot square. Let's say that this block of wood weighs about 50 pounds. Now say we lower that wood into the water. The wood will move down into the water until it has displaced 50 pounds of water. That means that fifty pounds of water are pushing back up on the block and making it float.

The principle of floating is pretty easy, however, if you want to remain inside the boat and actually get where you want to go, your boat must have "stability" as well as being able to float. Stability means that it is designed not to tip over easily. That doesn't mean it won't ever tip over.

On a large ship like an ocean liner or tanker, the movement of one person doesn't affect the stability of the ship because it was designed to safely carry lots of weight. But on a small boat, like a fishing boat, your weight and the weight of your gear (and where you put it) has an effect on the stability of the boat.

A boat is said to "heel" (no not the one on your foot) when it leans over to one side. This is why you never want to sit or step onto the side of a boat. Your weight could make it "heel" too much and it may tip over. You should also balance the weight of all the stuff you bring with you. In a small boat, you and your gear should always stay low and to the center of the boat. When getting into a small boat, always try to step into the center and keep "one hand for yourself and one for the boat."

Of course, because you have on your PFD and are displacing enough water to float, you would be okay, just a little wet and cold. If this should ever happen to you and you can't right the boat (turn it back over), stay with the boat, blow your whistle or yell for help.

So . . . the next time someone says "Whatever floats your boat" tell them about Archimedes and stability and why it's a very good idea to always wear your life jacket!

-Ravi

Answer 6

"How does a heavy boat float?

A boat, or any other object designed to float, is based on a theory by a very old guy, even older than Capt. Matt. Though he is old and, by the way, dead, he was really a cool guy and his name was Archimedes (Ark-i'-meed-eez). His principle, cleverly named the Archimedes' Principle, explains how things float.

If you fill your bathtub with water, what happens when you get in? The water rises, right? (And sometimes goes over the side.) That is because you "displaced" some of the water with your body and it had to go somewhere. The key to floating is that the object must displace an amount of water which is equal to its own weight.

For example, suppose you had a block of wood that was 1 foot square. Let's say that this block of wood weighs about 50 pounds. Now say we lower that wood into the water. The wood will move down into the water until it has displaced 50 pounds of water. That means that fifty pounds of water are pushing back up on the block and making it float.

The principle of floating is pretty easy, however, if you want to remain inside the boat and actually get where you want to go, your boat must have "stability" as well as being able to float. Stability means that it is designed not to tip over easily. That doesn't mean it won't ever tip over. "

http://www.boatsafe.com/kids/021598kidsq...

Answer 7

because they weigh less than the water they displace.