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This is the name given to a bouyancey force. When an object diplaces a fluid, the amount of upthrust received is proportional to the volume of fluid displaced. When an object is floating then the upthrust is equal to the objects weight. When more people get on to a boat, the boat sinks further into the water, displacing more water so that the upthrust increases to balance the new weight. If an object sinks then the amount of upthrust it receives is less than the weight so the object falls. Just because it sinks doesn't mean that there is no upthrust, there is. This is why heavy objects appear lighter if you place them in water.
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How do you calculate upthurst?
By adding
How pressure affects things under water?
the upthurst force acts on submerged objects
What forces are used when a duck is stationary?
The forces actin gon a rubber duck are gravity, upthurst, weight and normal forces
What is the main point on Archimedes principle?
Upthurst acts on a body which is partially or totally immersed in a fluid and it is equal to the weight of fluid displaced.
State archimedes' principle and give an example of how you could determine a buoynt force?
Upthurst acts on a body which is partially or totally immersed in a fluid and it is equal to the weight of fluid displaced.
Which force keeps a piece of wood floating?
It is caused by the difference in density between wood and water.One cubic foot of wood is usually lighter than one cubic foot of water, hence the water goes up a little but the wood goes up more.The overall density of the wood block is less than that of the water, so it floats.The basic principle is that when a solid object is immersed in a fluid, the solid displaces some of the fluid. This causes an upthrust on the solid, equal to the weight of fluid displaced. If the upthrust is equal to the weight of the solid it floats.
Show how Archimedes principle may be derived from concepts of fluid pressure?
Consider an object being immersed through a height h in a fluid. The pressure at the surface is smaller than the pressure at the bottom of the object. This difference in pressure, Dp, is given by: Dp = hdg where d is the density of the fluid and g is the acceleration of free- fall Now, Dp can be expanded as the ratio of force to area. So: F/A = hdg where F is the force exerted on the body and A is the bottom area of the object => F = Ahdg => F = Vdg since Ah = volume V => F = mfg where mf is the mass of fluid in the volume V ( mf = dV from the definition of density) => F = Weight of fluid displaced (shown) The force F is the upthurst on the body.
What is a pair of opposing forces that act on water as it goes through the water?
Capillary action and gravity is a a pair of opposing forces that act on water as it goes down through the soil.
