Respostas

2014-05-28T16:02:30-03:00
Primeiros vamos converter km/h para m/s 54/3.6=15m/s --->V^2=Vo^2+2.a.ΔS
15^2=0+2.a.75 ---->225=0+150a----> a=1,5m/s2
2014-05-28T17:00:40-03:00
54Km:3,6=15m/s
V^2=V8^2+2.aΔs.15^2=0+2.a.75
225=0+150a
-150a=-225(-1)
150a=225
a=225/150
a=1,5m/s²