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I have a question about the following problem:

A train is traveling at 100 m/s. The engineer applies the breaks because he sees the Batmobile stuck on the tracks ahead. The breaks cause an acceleration of -2.2 m/s^2. The engineer applies the breaks when the train is 960 m from the Batmobile. How long does it take the train to reach the Batmobile?

I thought I would use the linear motion equation of:

X = Xo + Vo(t) + 1/2at^2

But I became confused because I didn't know what to do about the distance "X" Is 960 the initial or final distance? A hint would be greatly appreciated.

Thanks

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# Homework Help: Linear Motion of a trian

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