Jawabanmu

2014-01-31T20:40:38+07:00
Dik = h : 45cm
         g : 10 m/  s^{2}  
Dit = V = \sqrt{2.g.h} ?
Penye =
V = \sqrt{2.10.45}
   = \sqrt{900}
   = 30[/tex]
2014-01-31T20:44:02+07:00
EP = EK
mgh = 1/2 m v^2
gh = 1/2 v^2
45.10 = 1/2 v^2
900 = v^2
v = 30m/s