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Vf= 90km/h (25m/s)
t= 20mi (1200s)
a=?
e=?
.......
Vf=Vo+at
a=Vf-Vo/t
a=(25m/s-11.11m/s)/(1200s)
a=(13,89m/s)/1200s
a=0,011m/s^2
.......
e=Vot+1/2at^2
e=(25m/s)(1200s)+1/2(0,011m/s^2)(1200s)^2
e=30000m+1/2(0,011)(1440000s^2)
e=30000m+7920m
e=37920m