Respostas

2013-12-08T13:19:58-02:00
Epg = m .g . h
Epg = 8 . 10 . 20 = 1600 Joule

Ecínetica = m . V² / 2  = 8 . ( 4√2)² / 2  =  8. 16.2 /2 = 128 J

Energia dissipada = 1600 - 128  = 1472 Joule



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