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Gravitation

Jharkhand Board · Class 9 · Science

Summary of Gravitation for Jharkhand Board Class 9 Science. Key concepts, important points, and chapter overview.

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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Overview

Gravitation is the fundamental force that governs the motion of objects on Earth and celestial bodies in space. This chapter explores Isaac Newton's discovery that the same force responsible for an apple falling to the ground also keeps the moon orbiting around Earth and planets revolving around the

Key Concepts

Every object in the universe attracts

Every object in the universe attracts every other object with a force proportional to the product of their masses and inversely proportional to the sq

When objects fall under Earth's gravitational

When objects fall under Earth's gravitational force alone, they experience free fall with acceleration g = 9.8 m/s². All objects fall at the same rate

Mass is the measure of inertia

Mass is the measure of inertia and remains constant everywhere (measured in kg). Weight is the gravitational force acting on an object (W = mg) and va

Thrust is force acting perpendicular

Thrust is force acting perpendicular to a surface. Pressure is thrust per unit area (P = F/A) measured in Pascal (Pa). Same force creates higher press

Buoyant force is the upward force

Buoyant force is the upward force exerted by fluids on immersed objects. Archimedes' principle states that buoyant force equals the weight of displace

Learning Objectives

  • Understand the concept of gravitational force and its universal nature
  • Learn and apply the universal law of gravitation with mathematical calculations
  • Distinguish between mass and weight of objects
  • Explain the concept of free fall and acceleration due to gravity
  • Calculate weight variations on different celestial bodies like the moon

Frequently Asked Questions

What are the important topics in Gravitation for Jharkhand 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 Jharkhand Board Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Gravitation — Jharkhand 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.

More resources for Gravitation

All 12 chapters — Jharkhand Board Class 9 Science Chapter Summary

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