Science>Physics>Fluids>Buoyancy and Archimedes' Principle

EASY

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Hot air balloon rises up because hot air is lighter than cold air.

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Important Questions on Fluids

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

What do you understand by buoyancy?

MEDIUM

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

Describe an experiment to show the existence of buoyant force.

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

A solid sphere of volume V and density

ρ

floats at the interface of two immiscible liquids of densities

ρ_{1}

and

ρ_{2}

respectively. If

ρ_{1} < ρ {< ρ}_{2,}

then the ratio of volume of the parts of the sphere in upper and lower liquid is

EASY

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

Explain the reason due to which buoyancy arises.

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

You find your mass to be

42 kg

on a weighing machine. Is your mass more or less than

42 kg

?

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

In what direction does the buoyant force on an object immersed in a liquid act?

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

The property which determines whether an object floats or sinks in water is termed as _____.

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

When an object is immersed in a fluid, name the two forces acting on it.

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

You have a bag of cotton and an iron bar, each indicating a mass of

100 kg

when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

EASY

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

A mug filled with water appears lighter inside the water compared to when the mug is held in the air. Why?

MEDIUM

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

What happens when we try to push an inflated balloon into a bucket of water?

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

What do you mean by buoyancy?

EASY

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

Why does a block of plastic released under water come up to the surface of the water?

MEDIUM

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

What do you mean by buoyancy?

MEDIUM

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

Two cylinders of same cross-section and length

L

but made of two material of densities

d_{1}

and

d_{2}

are cemented together to form a cylinder of length

2 L

. The combination floats in a liquid of density d with a length

\frac{L}{2}

above the surface of the liquid. If

d_{1} < d_{2}

then -

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

How does buoyant force help in making objects appear lighter in fluids?

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

When a floating body is pressed down a little, which of the two will increase - weight or upthrust?

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

A wooden cylinder floats in water with half of its volume inside water. The density of wood is -

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Science>Physics>Fluids>Buoyancy and Archimedes' Principle

A helium filled balloon moves upwards when released. This is because

MEDIUM

Science>Physics>Fluids>Buoyancy and Archimedes' Principle

Aarti made paper boats of following shapes.

Question Image

Which boat will sail in water easily? Why?