emiliannaesqueda emiliannaesqueda
  • 16-09-2020
  • Physics
contestada

A train can speed up at a uniform rate of 0.15 m/s2. In what minimum distance can
it attain a speed of 25 m/s if it is starting from rest?

Respuesta :

Muscardinus Muscardinus
  • 23-09-2020

Answer:

d = 2083.33 m

Explanation:

Given that,

Acceleration of the train, a = 0.15 m/s²

The initial speed of the car, u = 0\

Final velocity, v = 25 m/s

We need to find the minimum distance covered by the train. Let it is d. Using third equation of kinematics as follows :

[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{(25)^2-0}{2\times 0.15}\\\\d=2083.33\ m[/tex]

So, the minimum distance is 2083.33 m

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