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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.
The only thing for us to do is to illustrate these findings. Remember that we said that the escape velocity most commonly cited for Earth in terms of miles per second is that of 6.94444 mps (in reference to 25000 mph); and that of 11.1 kms/s (and, 11.2 kms/s) for the metric system.