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April 19, 2014

Homework Help: Chemistry

Posted by Lance on Wednesday, June 8, 2011 at 12:39am.

Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to this escape velocity of 11.2 km/s?I use Kinetic Energy = 1/2*m*v^2
6.65e10 is the answer but I keep getting 146576.64 or 1.46e5, Am I missing a conversion factor? Here is the math I used
(1/2)2337(11.2)^2= 146576.64

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