Child Advocates is an effective solution to the epidemic of child abuse because our volunteers ensure children exit the foster care system as quickly as possible so they can grow up in loving, permanent homes.
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 official name for this speed is called the escape velocity. If a spacecraft is launched from a pad on the surface of the earth with this speed or greater, it will escape the Earth's gravitational field. The escape velocity can be calculated from the Earth's mass, its radius, and Newton's gravitational constant G: v_esc=sqrt(2*G*M/R). It is assumed for that formula that air resistance doesn't slow down the spacecraft (a very wrong assumption).