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Fluid Pressure and Buoyancy: Class 9 Bhutanese Physics

10 Questions

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Fluid Pressure and Buoyancy: Class 9 Bhutanese Physics

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Questions and Answers

A block of wood is partially submerged in water. What is the direction of the buoyant force on the block?

Zero

Upward (correct)

Downward

Sideward

What is the force exerted by a fluid per unit area on an object?

Momentum

Fluid pressure (correct)

Buoyant force

Upthrust

A metal cube is completely submerged in water. If the density of the metal is greater than that of water, what is the direction of the net force on the cube?

Downward (correct)

Upward

Zero

Sideward

What is the reason for an object to float or sink in a fluid?

Density of the object Signup and view all the answers

According to Archimedes' Principle, what is the magnitude of the buoyant force on an object?

Equal to the weight of the fluid displaced Signup and view all the answers

A boy jumps into a swimming pool from the side. What is the force that helps him to partially float on the surface of the water?

Buoyant force Signup and view all the answers

A piece of ice is floating in a bucket of water. What is the magnitude of the weight of the ice compared to the magnitude of the buoyant force?

The weight of the ice is equal to the buoyant force Signup and view all the answers

A boat is floating in a lake. What happens to the buoyant force on the boat if it is loaded with more people?

The buoyant force increases Signup and view all the answers

A stone is thrown into a river. What is the direction of the buoyant force on the stone?

Upward Signup and view all the answers

A helium balloon is released in the air. What is the reason for the balloon to rise up?

The weight of the balloon is less than the buoyant force Signup and view all the answers