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OpenStudy (anonymous):
I'm so lost at this one, i'm feeling dumb. Can someone help me? http://www.feynmanlectures.info/exercises/atwood.html using Torricelli, i find that v²=v_0²+2ah (a=g, right?) so then g=v²/(2h) [using v_0=0]. But the answer is g = (2M+m)v² / 2mh
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