Gravitation is Chapter 7 in the NCERT Class 11 Physics book. This chapter explains one of the most universal forces in nature — gravity. From how objects fall to why planets move in orbits, all these phenomena are covered under gravitation. It introduces Newton’s law of gravitation, acceleration due to gravity, satellite motion, and even how tides are caused by the moon’s gravity.
I’m writing about this chapter because gravitation is not just a textbook topic. It’s something that affects our daily lives, from the simple act of walking to space missions. Many students find the formulas easy but get confused with the concepts. So having a proper understanding with a clean, easy-to-read NCERT PDF helps a lot. This topic is important for board exams and is frequently asked in JEE, NEET and other entrance tests. By breaking the chapter into parts and explaining them in a simple way, we can make it more manageable and interesting for learners.
NCERT Class 11 Physics Chapter 7: Gravitation – Overview
Gravitation, though invisible, is one of the strongest forces in Physics when it comes to shaping the universe. This chapter helps us understand how gravity works on Earth and in space.
Key Concepts Covered in the Chapter
1. Universal Law of Gravitation
- Newton’s Law: Every particle attracts every other particle
- Inverse square law
- Importance of the universal gravitational constant (G)
2. Acceleration Due to Gravity
- Value and variation of ‘g’ on Earth
- Factors that affect gravity: height, depth, rotation of Earth
- Difference between mass and weight
3. Gravitational Potential Energy
- Concept of potential energy in a gravitational field
- Derivation of formulas for U = –GMm/r
- Escape velocity and orbital velocity
4. Satellite Motion
- Circular and elliptical orbits
- Geo-stationary satellites
- Time period and energy of satellites
5. Kepler’s Laws of Planetary Motion
- Law of Orbits
- Law of Areas
- Law of Periods
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Click here to download NCERT Class 11 Physics Chapter 7: Gravitation PDF
