Question

menos a letra: A) e B)

Answer 1

Resposta:

100 m

Explicação passo-a-passo:

Fr=m.a

60=30.a

a=

30

60

a=2m/s

2

\begin{lgathered}v = v0 + at \\ v = 0 + 2.10 \\ v = 20 \: m/s\end{lgathered}

v=v0+at

v=0+2.10

v=20m/s

\begin{lgathered}v^2=v0^2+2a \Delta s \\ \Delta s = \frac{ {v}^{2} - {v0}^{2}}{2a} \\ \Delta s = \frac{ {20}^{2} - {0}^{2} }{2.2} = \frac{400}{4} = 100m\end{lgathered}

v

2

=v0

2

+2aΔs

Δs=

2a

v

2

−v0

2

Δs=

2.2

20

2

−0

2

=

4

400

=100m