Respostas

2014-07-21T21:45:04-03:00
S = So + VoT + At²/2
S = 0 + 20*4  -1*16
S = 80 - 16
S = 64 metros
11 3 11
2014-07-21T21:45:30-03:00
72km/h = 20 m/s


S= So + Vot+ at²/2


S = 0+ 20(4) - 2(4)²/2

S = 80 - 16

S = 64 m
7 3 7