What is the average power output of the engine of a truck when the truck travels up a 6km hill out of an open pit mine? The truck with the load, has a mass of 160,000kg, and starts from rest at the bottom of the hill. When the truck reaches the top of the hill it has a velocity of 15km/hr. The hill is 500m high and the truck took 42 seconds to reach the top of the hill. The average drag force on the truck during the time it is moving is 200N.

Define drag force for me? I haven't heard that term used so I don't quite know how to apply it to the problem

By output of the engine I mean likeaverage power... either in watts or horsepower