"Uniform motion" usually means constant velocity. However, if there is constant velocity then there is no change in kinetic energy hence no work done. Perhaps you mean there is "uniform acceleration"? You state that the object is not accelerated - is that what the question actually says, or is that your assumption?
If there is uniform acceleration (you will have to assume from rest, unless the question states otherwise), then I think you will be able to solve this easily.
Work done = force x distance = increase in KE. (I think you must also assume there is no friction.)
If there is no acceleration, the net force on the object is zero. So the net work done on the object is zero.
Perhaps there is friction, and the question is asking what work is done against the force of friction? That is easily calculated as force x distance.