Acceleration+Of+Gravity

= (Acceleration Of Gravity) = ( The acceleration of freely falling bodies under the influence of terrestrial gravity, equal to approximately 9.81 meters (32 feet) per second per second.Constant acceleration of a body falling freely under gravity, in a vacuum, or when air resistance is negligible. It varies slightly in different geographical locations as a result of differences in the distance from the centre of mass of the Earth. The standard accepted value, usually abbreviated as //g//, is 9.80 665 ms−1 s−1, or 32.17 feet s−1 s−1. Skydivers are sometimes said to be in free fall, but this is not strictly true, because their downward velocity is reduced by air resistance.

= History of (Topic) = ( **Sir Isaac Newton** - was an English mathematician and mathematician and physicist who lived from 1642-1727). ( **The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature).** = Application of (Topic) = (Topic Application - briefly describe some uses, applications, inventions, etc that utilize this discovery. "What's it good for?") They use the acceleration of gravity to see how fast and how long it takes an object to fall. One invention was the AtWood machine. It's good for seeing how long it would take a ball dropped from the roof to hit the ground.

= References =
 * 1) Beiser, A. (1988). //Physical Science (2nd Edition) //. New York, NY: McGraw Hill
 * 2) (Ref #2 - [|http://www.answers.com/topic/acceleration-of-gravity#ixzz1nowRXCLJ] )

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