Respostas

2014-06-16T22:27:21-03:00
A)V=-40+4t
b)0=-40+4t
-4t=-40
t=-40/4=-10s
c) Retardado entre 0s e 10s; acelerado entre 10s e 35s.
d)V=-40+4.100
V=-40+400
V=360m/s
e)120=-40+4t
120+40=4t
160=4t
160/4=t
t=40s
f)S=Si+Vi.t+a/2.t²
S=-40.40+4/2.40²
S=-1600+2.1600
S=-1600+3200
S=1600m

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