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Gravitation — Revision Notes

Madhya Pradesh Board · Class 9 · Science

Gravitation revision notes for Madhya Pradesh Board Class 9 Science: 4 topics in quick points. Part of the Madhya Pradesh Board Class 9 Science syllabus.

30 questions24 flashcards15 formulas & key relations5 concepts

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A diagram illustrating two objects with masses M and m, separated by a distance d, showing the gravitational force of attraction between their centers and the relevant variables.
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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 Madhya Pradesh Board Class 9 Science?
Key topics in Gravitation include Universal Law of Gravitation, Free Fall and Acceleration due to Gravity, Mass and Weight, Thrust and Pressure. Study these first, then practise questions on each for Class 9 exams.
How should I revise Gravitation for Class 9 exams?
Learn the core ideas first, then work through the 30 practice questions on Gravitation. 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.

More resources for Gravitation

All Madhya Pradesh Board Class 9 Science Revision Notes

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