Fluid Mechanics and Archimedes Principle

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What happens to an object when the upthrust is greater than its weight?

  • The object sinks.
  • The object displaces the fluid.
  • The object floats. (correct)
  • The object remains suspended.

A mug filled with water feels heavier when submerged underwater.

False (B)

What is the net upward force on an object in a fluid called?

buoyant force or upthrust

If upthrust equals the object's weight, the object will remain __________ at a particular depth.

<p>suspended</p> Signup and view all the answers

Match the following outcomes with their corresponding conditions:

<p>Floats = Upthrust &gt; weight Sinks = Upthrust &lt; weight Suspended = Upthrust = weight</p> Signup and view all the answers

What is the value of upthrust acting on a submerged wooden block with side length 10 cm?

<p>9.8 N (A)</p> Signup and view all the answers

The density of water is 1000 g/m³.

<p>False (B)</p> Signup and view all the answers

What principle is used to calculate the upthrust on a submerged object?

<p>Archimedes' principle</p> Signup and view all the answers

The volume of a cubic block of side length 10 cm is __________.

<p>0.001 m³</p> Signup and view all the answers

Match the following values to their units:

<p>Density of water = kg/m³ Gravitational acceleration = m/s² Weight in air = N Volume of wood block = m³</p> Signup and view all the answers

What is the principle that describes the up-thrust acting on an object immersed in a liquid?

<p>Archimedes' Principle (D)</p> Signup and view all the answers

The up-thrust on a submerged object can be less than the weight of the liquid it displaces.

<p>False (B)</p> Signup and view all the answers

What is the formula for calculating the up-thrust acting on a cylinder immersed in a liquid?

<p>F = ho g A h</p> Signup and view all the answers

The up-thrust acting on the cylinder is equal to the weight of the liquid __________ by the cylinder.

<p>displaced</p> Signup and view all the answers

Match the following applications with their descriptions:

<p>Ships = Made less dense than the volume of water they occupy Submarines = Can travel both above and below water Archimedes' Principle = Describes the relationship between up-thrust and liquid weight displaced Buoyancy Chambers = Used in ships to enhance buoyancy</p> Signup and view all the answers

In the equation $F = ho g A h$, what does the symbol $h$ represent?

<p>Height of the cylinder immersed (A)</p> Signup and view all the answers

Submarines float when the weight of water equal to their volume is less than their weight.

<p>False (B)</p> Signup and view all the answers

The formula for pressure at a depth $h$ is given by $P = ho g h$, where $ ho$ is the __________ of the liquid.

<p>density</p> Signup and view all the answers

Flashcards

Upthrust

The upward force exerted by a fluid on an object immersed in it.

Archimedes' Principle

The principle stating that the upthrust on an object immersed in a fluid is equal to the weight of the fluid displaced by the object.

Sinking

An object sinks if its weight is greater than the upthrust acting on it.

Floating

An object floats if its weight is less than the upthrust acting on it.

Signup and view all the flashcards

Suspension

An object remains suspended at a specific depth if its weight is equal to the upthrust acting on it.

Signup and view all the flashcards

Upthrust (buoyancy)

The upward force exerted by a fluid on an object immersed in it. It's equal to the weight of the fluid displaced by the object.

Signup and view all the flashcards

Apparent Loss of Weight

The weight of an object in air minus the weight of the same object submerged in water. It's equal to the upthrust acting on the object.

Signup and view all the flashcards

Relative Density

The ratio of the density of an object to the density of the fluid.

Signup and view all the flashcards

Weight (of an object)

The force acting on an object due to gravity. It's also called the weight of the object.

Signup and view all the flashcards

Density

The mass per unit volume of a substance.

Signup and view all the flashcards

What is upthrust?

The force experienced by an object immersed in a fluid due to the pressure difference between the top and bottom of the object.

Signup and view all the flashcards

State Archimedes' Principle.

The force exerted by a fluid on an object immersed in it is equal to the weight of the fluid displaced by the object.

Signup and view all the flashcards

How is upthrust calculated?

The net upward force acting on an object immersed in a fluid.

Signup and view all the flashcards

What is density?

The ratio of the object's mass to its volume.

Signup and view all the flashcards

What happens if the weight of an object is greater than the upthrust acting on it?

An object will sink if its weight is greater than the upthrust acting on it.

Signup and view all the flashcards

What happens if the weight of an object is less than the upthrust acting on it?

An object will float if its weight is less than the upthrust acting on it.

Signup and view all the flashcards

What happens if the weight of an object is equal to the upthrust acting on it?

An object will remain suspended at a specific depth if its weight is equal to the upthrust acting on it.

Signup and view all the flashcards

What is buoyancy?

The ability of a fluid to exert an upward force on an object immersed in it.

Signup and view all the flashcards

Study Notes

Fluid Mechanics

  • Fluids include liquids and gases
  • Fluid mechanics studies the behaviour of fluids
  • Static fluids involve the pressure exerted by fluids
  • Flowing fluids involve how fluids move and change depending on factors, like velocity or external forces
  • The study of flowing fluids is called fluid dynamics
  • Fluid dynamics is complex and often involves compressing assumptions such as steady flow, conservation of mass and energy
  • Basic equations for fluid mechanics include the continuity equation and Bernoulli's equation

Upthrust and Archimedes Principle

  • Upthrust is the upward force on an object submerged in a fluid.
  • Archimedes' principle states that the upthrust is equal to the weight of the fluid displaced by the object.
  • An object will float when the upthrust is greater than or equal to the weight of the object.
  • The following factors contribute toward whether an object floats, sinks, or remains suspended:
    • upthrust
    • weight of the object

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Use Quizgecko on...
Browser
Browser