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August 31, 2015

Homework Help: physics

Posted by Fallon on Sunday, May 9, 2010 at 6:29pm.

A 4.92E+2 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.81E+4 J of work on the balloon in the process. At what height above the surface of the earth does the balloon have a speed of 7.90 m/s?

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