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July 6, 2015

Homework Help: Physics

Posted by winget on Thursday, September 30, 2010 at 10:30am.

Electric stairs bring people up from Newyork metro station. Calculate the power consumption of the stairs during the rush hour if the stairs elevate 120 persons per minute up to the street level 30 meters above. Assume that the average weight of passengers is 70 kg and the efficiency of the stairs is 65%.

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