pattiniantonia92 30/04/2016 Ec = mv² / 29 = 0,08v² / 20,08v² = 18v² = 18 / 0,08v² = 225v = √225v = 15 m/s
pattiniantonia92
Ec = mv² / 2
9 = 0,08v² / 2
0,08v² = 18
v² = 18 / 0,08
v² = 225
v = √225
v = 15 m/s