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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.
To escape from Earth, the astronauts needed the three-stage Saturn V rocket to boost their spacecraft to a velocity of more than 25,000 miles per hour. The lunar lander was tucked safely into the top of the third stage, and the astronauts rode in the Apollo command module atop the stack.