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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.
You need an even higher velocity to get beyond Earth orbit. A good example of the difference between orbital speed and escape velocity is when Apollo went to the moon. First the Saturn V rocket boosted the astronauts into near Earth orbit which required a speed of about 18,000 mph. good example of the difference between orbital speed and escape velocity is when Apollo went to the moon. First the Saturn V rocket boosted the astronauts into near Earth orbit which required a speed of about 18,000 mph.