Respostas

2013-11-09T14:57:11-02:00
Vi = 120 km/h = 33,33 m/s
Vf = 30 km/h = 8,33 m/s

Vf = Vi + a x t
33,33 = 8,33 + a x 10
33,33 - 8,33 = 10a
25 = 10a
a = 25/10
a = 2,5 m/s² 

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