Respostas

2014-03-05T15:14:55-03:00
a =  \frac{v final - v inicial}{t final - t inicial}

a = ?
vi = 5 km/h ~> 5 ÷ 3,6 ~> aproximadamente 1,4 m/s
vf = 5,7 m/s
ti = 0s
tf = 20s

a =  \frac{5,7 - 1,4}{20 - 0}  ~> a =  \frac{4,3}{20}  ~> a = 0,215 m/s²
1 5 1