Final answer:
No work is done on the object as there is no net force acting on it.
Step-by-step explanation:
The work done on an object is given by the formula work = force x distance. In this case, since the object is moving at a constant speed, there is no net force acting on it and therefore no work is done on the object. The work done on the object would only be non-zero if there was a force acting in the direction of motion, which is not the case here.