Podcast
Questions and Answers
What happens to an object when the upthrust is greater than its weight?
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.
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?
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.
If upthrust equals the object's weight, the object will remain __________ at a particular depth.
Match the following outcomes with their corresponding conditions:
Match the following outcomes with their corresponding conditions:
What is the value of upthrust acting on a submerged wooden block with side length 10 cm?
What is the value of upthrust acting on a submerged wooden block with side length 10 cm?
The density of water is 1000 g/m³.
The density of water is 1000 g/m³.
What principle is used to calculate the upthrust on a submerged object?
What principle is used to calculate the upthrust on a submerged object?
The volume of a cubic block of side length 10 cm is __________.
The volume of a cubic block of side length 10 cm is __________.
Match the following values to their units:
Match the following values to their units:
What is the principle that describes the up-thrust acting on an object immersed in a liquid?
What is the principle that describes the up-thrust acting on an object immersed in a liquid?
The up-thrust on a submerged object can be less than the weight of the liquid it displaces.
The up-thrust on a submerged object can be less than the weight of the liquid it displaces.
What is the formula for calculating the up-thrust acting on a cylinder immersed in a liquid?
What is the formula for calculating the up-thrust acting on a cylinder immersed in a liquid?
The up-thrust acting on the cylinder is equal to the weight of the liquid __________ by the cylinder.
The up-thrust acting on the cylinder is equal to the weight of the liquid __________ by the cylinder.
Match the following applications with their descriptions:
Match the following applications with their descriptions:
In the equation $F =
ho g A h$, what does the symbol $h$ represent?
In the equation $F = ho g A h$, what does the symbol $h$ represent?
Submarines float when the weight of water equal to their volume is less than their weight.
Submarines float when the weight of water equal to their volume is less than their weight.
The formula for pressure at a depth $h$ is given by $P =
ho g h$, where $
ho$ is the __________ of the liquid.
The formula for pressure at a depth $h$ is given by $P = ho g h$, where $ ho$ is the __________ of the liquid.
Flashcards
Upthrust
Upthrust
The upward force exerted by a fluid on an object immersed in it.
Archimedes' Principle
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
Sinking
An object sinks if its weight is greater than the upthrust acting on it.
Floating
Floating
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Suspension
Suspension
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Upthrust (buoyancy)
Upthrust (buoyancy)
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Apparent Loss of Weight
Apparent Loss of Weight
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Relative Density
Relative Density
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Weight (of an object)
Weight (of an object)
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Density
Density
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What is upthrust?
What is upthrust?
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State Archimedes' Principle.
State Archimedes' Principle.
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How is upthrust calculated?
How is upthrust calculated?
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What is density?
What is density?
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What happens if the weight of an object is greater than the upthrust acting on it?
What happens if the weight of an object is greater than the upthrust acting on it?
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What happens if the weight of an object is less than the upthrust acting on it?
What happens if the weight of an object is less than the upthrust acting on it?
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What happens if the weight of an object is equal to the upthrust acting on it?
What happens if the weight of an object is equal to the upthrust acting on it?
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What is buoyancy?
What is buoyancy?
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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
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