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Lillle is running. She increases her initial speed of 30 km/h to 40 km/h so she
can win the race. If she takes 0.05 hours to complete this increase, what is
her acceleration?

Respuesta :

  • initial velocity=u=30km/h
  • Final velocity=v=40km/h
  • Time=t=0.05h

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{40-30}{0.05}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{10}{0.05}[/tex]

[tex]\\ \sf\longmapsto Acceleration=200km/h^2[/tex]

Hi1315

Answer

[tex]200km {h}^{ - 2} [/tex]

Explanation

[tex]Acceleration = \frac{final \: \: \: velocity - initial \: \: velocity }{time} \\ = \frac{(40 - 30)km {h}^{ - 1} }{0.05h} \\ = \frac{10}{0.05} \\ = 200km {h}^{ - 2} [/tex]

Hope this helps you.

Let me know if you have any other questions :-):-)

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