Respostas

2013-11-12T21:57:55-02:00
Vo = 108 km/h ( 108/3,6 = 30 m/s )
V = 0 km/h
T = 3 segundos

a = V / T = 30/3 = -10 m/s²

V² = Vo² + 2 * a * S
0² = 30² + 2 * ( - 10 ) * s
-900 = -20 / S
S = -900 / -20
S = 45 metros.