Train on 4.4 Incline: Solving for Momentary Rest

[Manni]

A train is traveling up a 4.4 incline at a speed of 3.10 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily?

The way I approached it that I reduced the speed to its x and y components. But I don't know what kinematic equations to use that relate the those two dimensions. Help?

 

[Villyer]

By 4.4 incline, does that mean that the incline rises 4.4 meters for every meter that is traveled horizontally? Or vice versa?

 

[Manni]

It means that the train makes an angle of 4.4 degrees relative to a flat surface