Question

Acceleration problem:

Answer 1

A car of weight 7000n travels at a steady speed 8m/s up a steady incline at 15 degrees above the horizontal. The car is acting against a frictional force of 500n.

This is a two part question, I've already solved the car's engine power = 18.5kw

The second part reads: If the car traveled down the incline with the same engine thrust and friction, what would it's acceleration be?

I'm not looking for the answer, but a nudge in the right direction would be appreciated.

Thanks in advance!