oxford views updated May 08 2018
The velocity required for atoms or molecules at high altitude to escape from a planet's gravitational field. For example:
Escape velocity (km/s)
oxford views updated Jun 27 2018
Minimum velocity required to free a body from the gravitational field of a celestial body or stellar system. Escape velocities are: for the Earth
, 11.2km/sec (7mi/s); and for the Moon, 2.4km/sec (1.5mi/s). They can be calculated from the formula: v = (2G M/R)1/2
where G is the gravitational constant, M
the mass of the planet or system, and R
the distance of the rocket from the centre of mass of the system.
gale views updated May 29 2018
Escape Velocity ★★ 1999 (R)
Scientists Cal (Bergin), Billie (Crewson) and their daughter Ronnie (Beaudoin) are on a deep space project when they discover a seemingly abandoned space ship. They find one crewman, Nash (Outerbridge), in suspended animation and make the mistake of bringing him out of his deep sleep. Of course, he turns out to be a psychotic. 100m/C VHS, DVD . Patrick Bergin, Wendy Crewson, Peter Outerbridge, Michelle Beaudoin; D: Lloyd A. Simandl; M: Peter Allen. VIDEO
oxford views updated Jun 08 2018
es·cape ve·loc·i·ty •
n. the lowest velocity that a body must have in order to escape the gravitational attraction of a particular planet or other object.