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the force of gravity on a mass
Period of Revolution
the time it takes a planet to go around the sun once
the feeling of weightlessness
when an object moves outward and falls downward at the same time
a force that pulls all objects toward one another
Acceleration Due to Gravity
force that keeps an object moving in a circle
describes the orbits of planets around the sun
the curved path, usually elliptical, around the sun or a planet
point where air resistance and pull due to gravity balance out on a falling object