Respostas

2014-03-18T16:14:20-03:00
M = 10 g -> 0,01 kgv = 400 m/sEc = ?Ec = 1/2.m.v²Ec = 1/2.0,01.400²Ec= 1/2.0,01.160000Ec = 0,01.80000Ec = 800 J