Question

2°) Uma particula percorre 100 m com velocidade média de 72 km/h. Em quanto tempo faz este percurso?​

Answer 1

Explicação:

x=100m

v=72km/h=20m/s

t=?

t=x/v

t=100/20

t=5s

Answer 2

$\Large\displaystyle\text{ \begin{gathered} \tt{72\,km/h\xrightarrow{\div3{,}6}\,=20\,m/s } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \tt{V_m=\dfrac{\Delta S}{\Delta t} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \tt{\Delta t=\dfrac{\Delta S}{V_m} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \tt{\Delta t=\dfrac{100\,[\,\diagdown\!\!\!\!m\,]}{20\,[\,\diagdown\!\!\!\!m/s\,]} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\boxed{\tt{ \Delta t=5\,[s]}}} \end{gathered} }$