Respostas

2014-08-08T20:35:19-03:00
2014-08-08T20:47:28-03:00
a-
V = Vo + at
0 = 25 + (-10)t
t = 25/10
t = 2,5 s

b-
V² = Vo² + 2 * a * d
0² = 25² + 2 * (-10) * d
20d = 625
d = 625/20
d = 31,25 m
1 3 1