Gravitation
Uttar Pradesh Board · Class 9 · Science
Quick revision notes for Gravitation — Uttar Pradesh Board Class 9 Science. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
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
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
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
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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What are the important topics in Gravitation for Uttar Pradesh Board Class 9 Science?
Gravitation covers several key topics that are frequently asked in Uttar Pradesh Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Gravitation — Uttar Pradesh Board Class 9 Science?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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