## [Computational Complexity] Jumping in Space

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• A fun fact from a McDonald s Happy Meal bag. You can jump six times higher in space. What does jump or higher mean in space? Given the pictures on the bag
Message 1 of 1 , Mar 5, 2007
A fun fact from a McDonald's Happy Meal bag.
You can jump six times higher in space.
What does "jump" or "higher" mean in space? Given the pictures on the bag I believe what they meant to say was
You can jump six times higher on the surface of the moon than on the surface of the earth.
Ask the Astronomer agrees since the ratio of gravity on the moon and the earth is about 1/6th. Is that correct? Not quite. In a 1973 Physics Teacher note, Van Neie fixed the mass M of a person and the force F the person exerts to get a height ratio of
(6F/Mg -1)/(F/Mg-1)
where g is the gravitational constant. This does approach six in the limit but only "if the force F is several times the individual's Earth Weight, an unrealistic assumption." If a person exerts twice his earth weight when he jumps, he will jump 11 times higher on the moon.

See what you can learn eating at McDonald's.

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Posted by Lance to Computational Complexity at 3/05/2007 04:07:00 PM

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