Resposta :

Olá!!

 

Usando Vm=ΔS/ΔT.saberemos:

 

10=30//ΔT

ΔT=30/10

ΔT=3s

[tex]\begin{cases} \Delta S = 30 \ m \\ V_m = 10 \ m/s \\ \Delta t = \end{cases} \\\\ V_m = \frac{\Delta S}{\Delta t} \\\\ \frac{10 \ m}{s} = \frac{30 \ m}{\Delta t} \\\\ \frac{1}{s} = \frac{3}{\Delta t} \\\\ \boxed{\Delta t = 3 \ s}[/tex]

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