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From the surface of the Earth, escape velocity (ignoring air friction) is about 7 miles per second, or 25,000 miles per hour. Given that initial speed, an object needs no additional force applied to completely escape Earth's gravity. Answered by: Paul Walorski, B.A. Physics, Part-time Physics Instructor.
For instance on the surface of the earth escape velocity is about 11.2 Km/s (or about 25,000 mph) However if a rocket were to go this fast on the surface of the earth it would probably sustain quite a bit of damage due to wind resistance.oe-Escape velocity when starting at the earth's surface is 11.2 km / sec or about 7 miles / sec. This is the radial component, and it is inversely proportional to the distance from the center of the earth, so it really depends on how high your original orbit is. Larry454 Â· 7 years ago. Thumbs up. 1.