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Gravity: The force of attraction imparted by the Earth on a mass that is at rest relative to the Earth. During every second of fall, the speed of a body freely falling in a vacuum in Earth’s gravity will increase by 32 feet per second.
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
