Tuesday, May 15, 2012

Archimedes

Using Archimedes' Principle explain why a rowboat will float. If the boat fills with water, explain why it will sink. 





43 comments:

joshua t said...

because the pressure of the water will push it down and if you put me whight in the boat.

Sammy P said...

The row boat will sink if it gets water in it because the weight of the water brings it down.

Maddie and Sophia!(: said...

If the row boat gets water in it, it will start to sink because of the pressure of the water inside the boat.

Emily W said...

The waters weight will weigh it down if it fills up with water.

jarred s said...

it will flot because of displacement and will sink because of the wate

Aleha C (: and Gracie N (: said...

The boat will sink because of the force of gravity will pull the water in the boat making it heavy.

Oja, Noah said...

The theory states that any floating object displaces its own weight.
The other theory that explains Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.
This means that if it is filled with water, the buoyant force acts upon it.

Sarah M said...

If the boat fills up with water and it will sink because the boat will weigh more and the water will take the shape of the boat as it rushes in.

Lauryn F said...

because the weight of the water and the amount of the pressure, forces the boat to sink.

Anonymous said...

Because the Boat can fill up with water it will sink because of the weight.

Dominique F. said...

Gravity is pushing down and bouyant force is pushing up.

Lexi:) said...

The row boat will sink if it gets water in it because the weight of the water brings it down.

thatdaviddude said...

The waters weight will weigh it down if it fills up with water.

kaylee m. :) said...

the bouyant force is pushing up and gravity is pushing down

Molly M said...

A row boat will float because the boat is light.THe row boat will sink because the waters weight.

Jasmine Mason said...

it floats because of its buoyant force, and the weight of the water and gravity overpower the buoyant forces causing the boat to sink if it fills with water.

caelin w said...

the water weight is high so it floats with the current

Sarah(: said...

The weight of the water will bring the row boat down

jason p said...

the bouyant force is pushing up and gravity is pushing down

Nicole C. said...

Using Archimedes' Principle explain why a rowboat will float. If the boat fills with water, explain why it will sink.

If a rowboat fills with water, it will sink because the force of the water pulls the boat down.

Brian B. said...

It will float depending on what the boat is made of and it will sink because of the weight of the water pullig the boat towards the ground!

kyle mckay said...

the boat has air pressure inside it pushing out and the air pressure keeps it afloat

Sabrina D :) said...

It will float depending on what the boat is made of and it will sink because of the weight of the water pullig the boat towards the ground and makes it all heavy. :)

Camille D :) said...

The boat will sink because the force of the water will pull the boat down.

maddi h said...

the weight of the water in the boat.

Jake T. said...

the boat will sick because the water pressure

professor jacqueline said...

Archimedes' principle, principle that states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid. The principle applies to both floating and submerged bodies and to all fluids, i.e., liquids and gases. It explains not only the buoyancy of ships and other vessels in water but also the rise of a balloon in the air and the apparent loss of weight of objects underwater. In determining whether a given body will float in a given fluid, both weight and volume must be considered; that is, the relative density, or weight per unit of volume, of the body compared to the fluid determines the buoyant force. If the body is less dense than the fluid, it will float or, in the case of a balloon, it will rise. If the body is denser than the fluid, it will sink. Relative density also determines the proportion of a floating body that will be submerged in a fluid. If the body is two thirds as dense as the fluid, then two thirds of its volume will be submerged, displacing in the process a volume of fluid whose weight is equal to the entire weight of the body. In the case of a submerged body, the apparent weight of the body is equal to its weight in air less the weight of an equal volume of fluid. The fluid most often encountered in applications of Archimedes' principle is water, and the specific gravity of a substance is a convenient measure of its relative density compared to water. In calculating the buoyant force on a body, however, one must also take into account the shape and position of the body. A steel rowboat placed on end into the water will sink because the density of steel is much greater than that of water. However, in its normal, keel-down position, the effective volume of the boat includes all the air inside it, so that its average density is then less than that of water, and as a result it will float.

Stevey A said...

The boat would sink with water in it because of the pressure in the water

andrew b said...

the boat is filled with air and the airs mass is lighter than the mass of water therefore it floats if the boat is filled with water it then becomes greater to or equal of the mass of water

Anonymous said...

The boat floats because it is light and sits on the surface water, and the reason why it sinks when water gets in it is because it is not sitting on the surface anymore and it fills with water.

Anonymous said...

Why the rowboat will float because because it always depends on the weight of the boat and how it is made out of.(:
Hannah(;

alex pinkham said...

The boat will sink because the force of the water will pull the boat down. the bout flouts because of the bouncy :)

Anonymous said...

www.infoplease.com

Grace B said...

The boat's filled with air and if the boat was filled with water it would sink.

matt c said...

the boat will float because of the buoyant force and it will sink because of how much heavier than it was

Aaron R said...

depending on what the boat is made of it will float and depending on the amount of water in the boat the boat will either stay afloat or sink.

Lucas T said...

The boat will float because it sits on the water and doesn't way that much.

It will sink because the force of the water pulls it down.

Liz Napolitano❤ said...

Using Archimedes' Principle explain why a rowboat will float. If the boat fills with water, explain why it will sink.

The boat's filled with air and if the boat was filled with water it would sink.

Liz

emile w said...

the boat will sink acuase it likes trains

Holly J said...

The boat will float because its filled with air and it also depends on how much weight is in the boat. It depends on how much water is in the boat for it to sink. If the weight is too much it will sink. If there is just a little water it won't sink.

Connor p said...

The boat has air in it so it floats if it had water in it it would sink and go down with it's fishy friends

Kasey G. said...

The buoyant force cancels out gravity, but when the water it gets into the boat, it's weight increases, and therefore gravity's pull on it increases.

Archer t said...

Bouyant force is stronger than gravity on the boat and if water went in the boat, it would heavier and would sink.