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- Free fall
Motion of a body where its weight is the only force acting upon it; any motion of a body where gravity is the only force acting upon it
In classical mechanics, free fall is any motion of a body where gravity is the only force acting upon it. A freely falling object may not necessarily be falling down in the vertical direction. An object moving upwards might not normally be considered to be falling, but if it is subject to only the force of gravity, it is said to be in free fall. The Moon is thus in free fall around the Earth, thou... Wikipedia
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