Question

Quanto tempo um atleta gasta para percorrer 400m, com velocidade média de 5m/s?

Answer 1

$\Large\displaystyle\text{ \begin{gathered} \sf{ V_m=\frac{\Delta S}{\Delta t}\iff \Delta t=\frac{\Delta S}{V_m}} \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{\Delta t=\frac{400}{5} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\sf{ \Delta t=80\,s}}} \end{gathered} }$