How to Calculate Average Power of a Train Pulling an Object on a Slope

[mistabry]

Homework Statement

A railroad engine pulls a train of mass 1.3*10^6 kg up an average slope of 1.1 degree for a distance of 57.0 km. If the speed of the train is 48.0 km/h, what is the average power produced by the engine?

Homework Equations

a = F_n/m

The Attempt at a Solution

Created a freebody diagram with Force going to the right going slightly up @ 1.1 degrees. Weight going down. Normal force going up with 1.1 degree angle going slightly left. I got trouble here because I got the FBD, but I don't see how it is relevant D;

 

[jeffc0987]

Few more relative equations

Power is the change in work over the change in time.
Work is the force multiplied by the displacement.

Finding the force required to move it, the distance the train travels, and the time it takes the train to travel that far should get you to your answer pretty quickly.