Question

If a train going 60m/s hits the brakes and it takes the train 1 minute 25 seconds to stop what is the acceleration?

Answer 1

Answer: 0.71 m/s^2

Step-by-step explanation:

60+25=85s

60/85=0.71m/s^2

Hope this helped have a great day!! :)

Answer 2

Given:

The initial speed of the train is,

`u=60\text{ m/s}`

The time to stop is,

`\begin{gathered} t=1\text{ m 25 s} \\ =(60+25)\text{ s} \\ =85\text{ s} \end{gathered}`

The final speed is,

`v=0`

To find:

The acceleration

Explanation:

Using the formula of speed,

`v=u+at`

Here, a is the acceleration.

Substituting the value we get,

`\begin{gathered} 0=60+a*85 \\ a=-(60)/(85) \\ a=-0.71\text{ m/s}^2 \end{gathered}`

Hence, the acceleration is,

`a=-0.71\text{ m/s}^2`