## Most recent change of EscapeVelocity

Edit made on July 23, 2009 by GuestEditor at 14:27:45

Deleted text in red / Inserted text in green

WW
If an object is projected fast enough from the surface of a heavenly body it will break free of its gravitational field.

The formula for the escape velocity EQN:v_e of a body of mass M and radius r is:

EQN:V_e=\sqrt{\frac{2GM}{r}}

where G is the Universal Gravitational Constant: EQN:G=6.674\times10^{-11}

The escape velocity from the surface of the Earth is 11.2 km/sec (7.0 miles/sec) miles/sec), not to be confused with
orbital velocity at grazing altitude, which is smaller by a factor of EQN:\sqrt{2}

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* http://en.wikipedia.org/wiki/Escape_velocity