Question

A velocidade de um carro passa de 20m/s para 50m/s em 10s. A aceleração do carro vale:

a) 7m/s^2
b) 6m/s^2
c) 5m/s^2
d) 4m/s^2
e) 3m/s^2

Answer 1

Fórmula: V = Vo + a.t

V = 50 m/s

Vo = 20 m/s

t = 10s

50 = 20 + a.10

30 = a.10

a = 3 m/s²

Answer 2

$\begin{gathered}\LARGE\boxed{\begin{array}{lr}\rm \: \sf A = \dfrac{\Delta S}{\Delta t}\\\\\rm \: \text{ \sf A = \dfrac{30 \red{\left[m\right] }}{10 \red{\left[s\right]}} } \\\\\rm \boxed {\text{ \sf A = 3 \red{\left[\dfrac{m}{s^2}\right] } }} \end{array}}\end{gathered}$