Gravitation — Topic Overview

Gravitation is the fundamental force of attraction between any two masses. ME-06 covers the complete NEET syllabus for this topic in 7 interconnected areas:

Core Framework:

Newton's Universal Law
        ↓
   g = GM/$R^{2}$  (surface gravity)
        ↓
   Variation of g
   ├── With Altitude (inverse-square)
   ├── With Depth (linear)
   └── With Latitude (centrifugal)
        ↓
   Kepler's Three Laws
   ├── First: Elliptical orbits
   ├── Second: Equal areas (angular momentum)
   └── Third: $T^{2}$ ∝ $r^{3}$
        ↓
   Gravitational PE & Potential
   ├── U = −GMm/r
   └── V = −GM/r
        ↓
   Orbital Mechanics
   ├── Orbital velocity: v_{0} = √(GM/r)
   ├── Escape velocity: vₑ = √(2GM/R)
   └── Satellite energies: KE:PE:E = 1:−2:−1

NEET Weightage: 2–3 questions per year (6–12 marks). Every sub-topic has been tested at least once in the past 10 years.

Three Most Common NEET Question Types:

1. Compare g at altitude vs depth
2. Escape velocity for scaled planets
3. Satellite energy and orbital mechanics