# Force vector without acceleration

This is just to see if I am totally confused or making sense.

## Homework Statement

A truck is pushing up a hill on a 30 degree incline. It has a mass of 45 tons. Find the force vector for the truck.

## Homework Equations

$$\vec{F}$$ = ||F|| cos$$\theta$$ i + ||F|| sin$$\theta$$ j

## The Attempt at a Solution

$$\vec{F}$$ = 45 cos30 i + 45 sin30 j
This is the answer that I assume was wanted, but I don't think that I can say what the force is given only the mass of the truck. After I asked my physics teacher (not the one who gave the quiz), he told me that this is the answer when moving at a constant velocity. If it was stated in the problem that the truck moved at a constant velocity is this correct?