Page 11 - Curriculum Visions Dynamic Book

The lowest altitude to achieve this is about 200 kilometres. Earth orbital velocity is about 29,000 kilometres per hour for this altitude. At higher altitudes the velocity is lower.
Direction parallel to the Earth. payload can now be released.
Continuing to gain height depending on final orbit altitude.
centrifugAl force A force that acts on an orbiting or spinning body, tending to oppose gravity and move away from the centre of rotation.
friction The force that resists two bodies that are in contact.
geosyncHronous orbit An orbit in which a satellite makes one circuit of the Earth in 24 hours.
grAvity/grAvitAtionAl force The force of attraction between bodies. The larger an object, the more its gravitational pull on other objects.
pAyloAd The spacecraft that is carried into space by a launcher.
tAngent A direction at right angles to a line radiating from a circle or sphere.
trAjectory The curved path followed by a projectile.
velocity A more precise word to describe how something is moving, because movement has both a magnitude (speed) and a direction.
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