Respostas

2014-05-25T20:23:06-03:00
Em(inicial) = Em(final)
Ec + Epg = Ec + Epg
0 + m*g*h = m*V²/2 + 0

g*h = V²/2
10*5 = V² / 2
50*2 = V²
V= Raiz de 100
V=10m/s (Letra B)
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