Gravitation Class 11 Physics Notes – Formulas & Quick Revision

Gravitation mein Newton ka universal law, Kepler ke laws, satellites aur escape velocity aate hain — formula-heavy scoring chapter. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.

Important Formulas & Concepts — Gravitation

• F = Gm₁m₂/r²; G = 6.67 × 10⁻¹¹ N·m²/kg²
• g = GM/R²; height: gₕ = g(1 − 2h/R) (h << R)
• Depth: g_d = g(1 − d/R)
• Gravitational PE: U = −GMm/r
• Escape velocity: vₑ = √(2gR) = 11.2 km/s (Earth)
• Orbital velocity: v₀ = √(GM/r); vₑ = √2 · v₀
• Kepler 3rd law: T² ∝ r³
• Geostationary satellite: T = 24 h, h ≈ 36,000 km

Quick Revision Points

• g equator par kam, poles par zyada
• Satellite ke andar weightlessness — normal force zero
• Satellite ki total energy = −GMm/2r (negative = bound)
• Kepler 2nd law = angular momentum conservation
• Escape velocity object ke mass par depend nahi karti

FAQ

Escape velocity ka derivation aata hai?

Haan boards mein — complete notes mein energy method se clean derivation hai.

Satellite numericals kaise practice karun?

PDF ke solved patterns + hamare free calculators use karo.

Explore more: free sample notes, free calculators aur interactive simulators.