Odpowiedzi

2009-11-27T18:32:22+01:00
H = 2,45m
g = 10m/s²

Ep = Ek
mgh = (mv²)/2 |*2
2mgh = mv² |skracamy m
2gh = v²
v = √2gh |pierwiastek z całego 2gh

v = √2*10m/s²*2,45m
v = √20m/s²*2,45m
v = √49m²/s²
v = 7m/s