Respostas

2013-07-29T21:56:16-03:00
Vf = 72 km/h = 20m/s
Vo = 54 km/h = 15m/s

a = (Vf - Vo)/t

a = 5/10

a = 0,5m/s²


V² = Vo² + 2.a.S

20² = 15² + 2.0,5.S

400 = 225 + S

S = 400 - 225 = 175 m
5 3 5