v2 = (0 m/s)2 + 2 (9.81 m/s2) (200 m) = 63 m/s
What is the force Superman exerts to stop a plane from crashing into the ground, or the speed and mass of Vince Vaughn’s winning Dodgeball shot? What’s the force exerted by a Dominique Wilkins windmill slam dunk, or the speed of a retired Charles Barkley? What’s the frequency of a cat’s purr? …the mass of a snowflake? …the pressure inside a can of soda? ..the reaction time of the human fingertip?
The Physics Factbook, via hypertextbook.com, is “an encyclopedia of scientific essays written by high school students that can be used by anybody,” containing over 800 entries and special topics.
Also from hypertextbook.com: E-world (which hosts a cool reloadable mosaic of a ton of NYC traffic video cameras), the Physics Hypertextbook and the Chaos Hypertextbook.
RobDurdle.com 
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