Question

a) 30m/s
b) -50m/s
c) 0m/s
d) 50m/s
e) 70m/s
alguém pfv

Answer 1

S = -120 + 30.t - 4.t²

Vo = 30 m/s

a = 8 m/s²

V = Vo + a.t

V = 30 - 8.10

V = 30 - 80

V = -50 m/s