isaac-pinho
isaac-pinho
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1 a) t = 5 s = -4 + 2*5 s = 6 m b) 3 = -4 + 2t 2t = 3 + 4 t = 7/2 = 3,5 s 2) a) Vj = 72 Km/h = 20 m/s; Vc = 54 Km/h = 15 m/s Sj = 20t Sc = 100 + 15t Sj = Sc 20t = 100 + 15t 20t-15t = 100 t = 100/5 t = 20 s b) Sj = 20*20 …