BALLISTIC TRAJECTORIES
BALLISTIC TRAJECTORIES
BALLISTIC TRAJECTORIES
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THE ESCAPE VELOCITY<br />
• A vehicle will escape earth if it has a parabolic<br />
(e=1) or hyperbolic (e>1) trajectory<br />
• In the case of a parabolic trajectory, the kinetic<br />
and potential energies are equal<br />
• The escape velocity is larger than orbital<br />
velocity by a factor of 2 1/2<br />
• If at burnout V b Km/sec the vehicle will<br />
escape earth independent of the direction of<br />
motion