Chapter 8 of 12
Syllabus
Floating bodies — Syllabus
Telangana Board · Class 9 · Physical Science
Floating bodies topics: Density and Relative Density, Pressure in Fluids, Buoyancy and Archimedes' Principle, plus 1 more.
44 questions20 flashcards5 formulas & key relations5 concepts
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4 Topics · Telangana Board Class 9 Physical Science · 2026-27
Topics in Floating bodies
1
Density and Relative Density
- Density is mass per unit volume, measured in g/cm³ or kg/m³
- Objects with density greater than water (1 g/cm³) tend to sink, while those with lower density tend to float
- Relative density compares an object's density to water's density - it has no units
2
Pressure in Fluids
- Atmospheric pressure = 1.01 × 10⁵ N/m² = 1 atmosphere = 76 cm of Hg
- Pressure in liquids increases with depth due to weight of liquid column above
- Pressure at depth h in liquid: P = P₀ + hρg
3
Buoyancy and Archimedes' Principle
- Buoyant force acts upward on any object immersed in fluid
- Archimedes' Principle: Buoyant force equals weight of fluid displaced
- For floating objects: Weight of object = Weight of displaced fluid
4
Conditions for Floating and Sinking
- Object floats if: Density of object < Density of fluid
- Object sinks if: Density of object > Density of fluid
- Object neutrally buoyant if: Density of object = Density of fluid
Key Concepts
Density is mass per unit volumeWhen a body is immersedBuoyancy is the upward force exertedAtmospheric pressure (1 atm = 1External pressure applied to an enclosed
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What are the important topics in Floating bodies for Telangana Board Class 9 Physical Science?
Key topics in Floating bodies include Density and Relative Density, Pressure in Fluids, Buoyancy and Archimedes' Principle, Conditions for Floating and Sinking. Study these first, then practise questions on each for Class 9 exams.
How should I revise Floating bodies for Class 9 exams?
Learn the core ideas first, then work through the 44 practice questions on Floating bodies. 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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