A train of mass [tex]m=1.5 \cdot 10^5 kg [/tex] is travelling at [tex]40m/s [/tex] when the brakes are applied and it decelerates steadily. The train travels a distance of [tex]250m[/tex] before coming to a halt.(adsbygoogle = window.adsbygoogle || []).push({});

a) Calculate the deceleration of the train.

b) Find the average braking force.

I have tried to solve it using formulas such as:

[tex] v^2 =v_{0} ^2 +2as [/tex] and so the others of that family, but they do not work because I need to know three variables to find the others...

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: A train decelerates

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