Escape velocity of earth: Escape Velocity - HyperPhysics

Escape Velocity - HyperPhysics ... Escape Velocity Now, let’s plug in some numbers to determine the escape velocity from the surface of the Earth . For M, we use the mass of the Earth , which is approximately 5.97 × 10 24 kg. For r, since we are calculating the escape velocity from the surface of the Earth , we can use the Earth ’s radius, which is approximately 6.37 × 10 6 m. On earth, the escape velocity is around 40,270 kmph, which is around 11,186 m/s. For example, when a spacecraft is launched into outer space, the velocity attained by this should be greater than the escape velocity so that the rocket doesn’t fall back onto earth. For Earth, this speed is about 11.2 km/s. It depends on the mass and size (radius) of the celestial body and is calculated using principles of energy conservation. Escape velocity is a key concept in physics, especially when studying motion, gravity, and space exploration.