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Posted on: 08:47:21 PM on February 2, 2017
A rope ladder with a length l carrying a man with a mass m at its end is attached to the basket of a balloon with a mass M. The entire system is in equilibrium in the air. As the man climbs up the ladder into the balloon, the balloon descends by a height h. The potential energy of the balloon?


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Posted on: 11:25:22 PM on February 2, 2017
Fext =0 Dec.in PE of balloon=inc.in PE of man=mg (l-h)=dU=Ui-Uf Uf=Mgl-mg (l-h)



Posted on: 09:56:55 PM on February 3, 2017
mg(l-h)





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