What Is Escape Speed — Really?

Escape velocity (or escape speed) is the minimum speed required for an object to escape a planet’s gravitational field. In this video, we derive the escape velocity formula step by step using conservation of mechanical energy. You’ll see why, at infinite distance, the speed becomes zero — and why escape velocity depends only on the planet’s mass and radius, not on the mass of the object. This derivation is a core mechanics concept and appears frequently in IB Physics, AP Physics, and A-Level Physics. Topics covered • What escape velocity really means • Why “just barely escaping” implies zero speed at infinity • Energy conservation in gravitational fields • Derivation of the escape velocity formula • Why mass cancels out Escape velocity formula v = \sqrt{\frac{2GM}{R}} Question: Can you calculate the escape velocity of Earth? Comment your answer below. #EscapeVelocity #Physics #Mechanics #Gravitation #SpacePhysics