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Buoyancy, Density, and Water
Properties of Fluids Overview: Archimedes’ PrinciplePascal’s Principle Bernoulli’s Principle Boyle’s Law
Density is the mass of a substance per unit volume (usually measured in grams per milliliters, g/ml). Buoyancy is the upward force that a fluid exerts on an object less dense than itself.
Q: How do ships float?
A: A greater force is pushing up on the ship than the weight force pushing down.This supportive force is called buoyant force.
If the buoyant force is equal to the object’s weight, it will float.
If the buoyant force is less than the object’s weight, it will sink.
Bouyant force was explained by Archimedes and it became known as Archimedes’ Principle. Archimedes was a Greek mathematician who lived around the 3rd century B.C.
Archimedes’ Principle states that an objects weight will cause the object to sink while at the same time displacing the fluid.
If the weight of the water displaced becomes equal to weight of the object, it floats.
If the weight of the water displaced becomes less than the weight of the object, it sinks.
Q: Why is this principle important?
A: Properties of fluids ultimately determine the design of ships, airplanes, cars, and hydraulic machines.
Water exerts pressure in all direction.Consider swimming in a pool. The deeper you go the more pressure you feel.
Pressure is a force exerted on an object per unit area.
As you know pressure is not exclusive to liquidsAs you know pressure is not exclusive to liquids. The earth’s atmosphere exerts pressure all around you.
Pascal’s Principle Pascal was a French scientists who lived in the 1600’s. He discovered a property of fluids now known as Pascal’s Principle.
According to Pascal’s Principle pressure applied to a fluid is transmitted throughout the fluid.
For example when you squeeze a tube of toothpaste at one end, what happens?
Pressure is transmitted throughout the fluid toothpaste.Why? Pressure is transmitted throughout the fluid toothpaste.
Calculating Forces Using Pascal’s PrinciplePressure = Force/Area = F/A In a system, P1 = P2:: F1 = F2 A1 A2
Bernoulli’s PrincipleAs the velocity of a fluid increases, the pressure exerted by the fluid decreases.
Boyle’s Law As a gas is squeezed into a smaller space, its particles will strike the walls more often, increasing its pressure. The opposite is also true.
Calculating Pressure Using Boyle’s LawP1 V1 = P2 V2
Chapter 13 Fluid Pressure.
Fluid Mechanics Liquids and gases have the ability to flow
Properties of Fluids. Buoyancy Fluid = a liquid OR gas Buoyancy = The ability of a fluid (a liquid or a gas) to exert an upward force on an object immersed.
Chapter 3: Forces & Fluids Review. How can you change the pressure on the ground when you are standing? Stand on one foot (decrease area) Change into.
Forces in Fluids Ch. 11.
Properties of Fluids Chapter 14 Section 2. How do ships float? Despite their weight, ships are able to float. This is because a greater force pushing.
Chapter 13 Forces in Fluids.
The kinetic theory of matter can be used To explain how molecules move.
Unit 1 Lesson 5 Fluids and Pressure
The tendency or ability of an object to float.
Buoyancy Properties of Matter.
Forces in Fluids Chapter 11.
Properties of Fluids 16.2 How do ships float?
Any substance that can change shape or flow easily.
12.3 Buoyancy is a force Buoyancy is a measure of the upward force a fluid exerts on an object that is submerged. The water in the pool exerts an upward.
14.2 Essential Questions What is Archimedes’ principle?
Section 2 Properties of Fluids
Section 2. How can a huge ship float? Because the force pushing up on the ship opposes the weight of the ship pushing down Supporting force is called.
Go with the Flow How Dense are you? Floaty Force Under Pressure Famous People Hodge Podge
Bernoulli’s, Pascal’s, & Archimedes’ Principles Principles of Fluids.
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