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Gravitation

Rajasthan Board · Class 9 · Science

Quick revision notes for Gravitation — Rajasthan Board Class 9 Science. Key concepts, formulas, and definitions for last-minute revision.

30 questions24 flashcards5 concepts

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An illustration showing Newton under an apple tree, with an apple falling towards the Earth, and simultaneously, the Moon orbiting the Earth, to visually connect the two phenomena under the same gravi
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Key Topics to Revise

1

Universal Law of Gravitation

  • Newton discovered that the same force causes apples to fall and moon to orbit Earth
  • Every object in the universe attracts every other object with gravitational force
  • Gravitational force is directly proportional to product of masses
2

Free Fall and Acceleration due to Gravity

  • Free fall occurs when objects fall under gravity alone (no air resistance)
  • All objects fall at same rate in vacuum regardless of mass
  • Acceleration due to gravity (g) = 9.8 m/s² near Earth's surface
3

Mass and Weight

  • Mass is measure of inertia and remains constant everywhere
  • Mass is amount of matter in an object
  • Weight is force with which Earth attracts an object
4

Thrust and Pressure

  • Thrust is force acting perpendicular to surface
  • Pressure is thrust per unit area (P = F/A)
  • Same force on smaller area creates higher pressure

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Full Notes

Key Concepts

Every object in the universe attractsWhen objects fall under Earth's gravitationalMass is the measure of inertiaThrust is force acting perpendicularBuoyant force is the upward force

Frequently Asked Questions

What are the important topics in Gravitation for Rajasthan Board Class 9 Science?
Key topics in Gravitation include Chapter 9 Gravitation — Complete Concept Map, Gravitation Chapter — Complete Concept Map, Chapter 9 Gravitation — Concept Overview. These are the concepts Rajasthan Board Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Gravitation — Rajasthan Board Class 9 Science?
Understand the core concepts first, then work through the 30 practice questions available for this chapter. Revise formulas and 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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All 12 chapters — Rajasthan Board Class 9 Science Revision Notes

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