Ulearno JEE Main 2026 Physics – Gravitation Smart Revision eBook

Gravitation

Gravitation is an important mechanics chapter in JEE Main Physics. It explains gravitational force, gravitational field, potential, satellites, escape velocity, and planetary motion. This chapter is highly scoring and contains both conceptual and numerical problems.

Topics Covered

• Newton’s Law of Gravitation
• Universal Gravitational Constant
• Gravitational Field and Intensity
• Gravitational Potential
• Potential Energy
• Acceleration Due to Gravity
• Variation of g with Height and Depth
• Escape Velocity
• Orbital Velocity
• Satellites
• Kepler’s Laws of Planetary Motion

Important Formulas

Newton’s Law of Gravitation:
F = G(Mm)/r²

Acceleration Due to Gravity:
g = GM/R²

Gravitational Potential:
V = -GM/r

Potential Energy:
U = -GMm/r

Orbital Velocity:
v = √(GM/r)

Escape Velocity:
v = √(2GM/R) = √(2gR)

JEE Main Preparation Tips

• Memorize all satellite and velocity formulas.
• Understand variation of g with altitude and depth.
• Practice numerical problems on orbital motion.
• Revise Kepler’s laws with applications.
• Solve previous year JEE Main questions for accuracy.