🌍 6. Gravitational Fields
📖 Theory – 🌍 6. Gravitational Fields
Newton's law of gravitation: F = Gm₁m₂/r², where G = 6.67 × 10⁻¹¹ N m² kg⁻².
Gravitational field strength g = F/m = GM/r².
Gravitational potential energy U = -GMm/r.
Gravitational potential V = -GM/r.
Escape velocity: v_esc = √(2GM/r).
Kepler's laws describe planetary motion.
Orbital velocity v = √(GM/r) for a circular orbit.
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