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Upthrust in Fluids and Archimedes Principle and Floatation — Chapter Summary

ICSE · Class 9 · Physics

Summary of Upthrust in Fluids and Archimedes Principle and Floatation for ICSE Class 9 Physics. Part of the ICSE Class 9 Physics syllabus.

42 questions32 flashcards15 formulas & key relations5 concepts

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A diagram illustrating a body partially or wholly immersed in a fluid, showing the upward buoyant force (upthrust) acting on it, opposing its weight. Include an empty can being pushed into water as an
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Overview

Upthrust, also called buoyant force, is the upward force exerted by a fluid on a body immersed in it. Buoyancy is the property of a liquid to exert this upward force. A body in a fluid is acted on by its weight downward and upthrust upward. Archimedes' principle states that the upthrust on a body im

Key Concepts

The upward force exerted on

The upward force exerted on a body by the fluid in which it is submerged is called upthrust or buoyant force and is denoted by F_B. Its maximum value

Buoyancy is the property of

Buoyancy is the property of a liquid to exert an upward force on a body immersed in it.

When a body is immersed partially

When a body is immersed partially or completely in a liquid, it experiences an upthrust equal to the weight of the liquid displaced by it. This princi

Density is the mass per unit

Density is the mass per unit volume of a substance. The formula is ρ = M/V. Its SI unit is kg m^-3 and its CGS unit is g cm^-3.

Relative density is the ratio

Relative density is the ratio of the density of a substance to the density of water at 4°C. It is also the ratio of the mass of a substance to the mas

Learning Objectives

  • Understand the meaning of upthrust and buoyancy
  • Explain why a body floats or sinks in a fluid
  • State and use Archimedes' principle
  • Relate upthrust to the weight of displaced fluid
  • Understand density and relative density

Frequently Asked Questions

What are the important topics in Upthrust in Fluids and Archimedes Principle and Floatation for ICSE Class 9 Physics?
Key topics in Upthrust in Fluids and Archimedes Principle and Floatation include Upthrust, Buoyancy, and Their Nature, Archimedes' Principle and Its Verification, Floatation and Conditions for Floating or Sinking, Density and Relative Density. Study these first, then practise questions on each for Class 9 exams.
How should I revise Upthrust in Fluids and Archimedes Principle and Floatation for Class 9 exams?
Learn the core ideas first, then work through the 42 practice questions on Upthrust in Fluids and Archimedes Principle and Floatation. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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