Respostas

2014-07-03T20:24:37-03:00
Hmax=gt²/2
T=√2h/g
T=√2*60/9,8
T=√120/9,8
T=√12,24
T=3,49 s
2014-07-03T20:26:58-03:00
T² = 2.h/g
t = √2.60/9,8
t ≈ 3s