Final answer:
The weight of the box and the normal force do no work on the box as it is pulled to the right because they act perpendicular to the direction of the box's displacement. The tension in the rope and the frictional force do work as they have components in the direction of displacement.
Step-by-step explanation:
The student's question is about identifying which forces do no work on a box as it is pulled to the right across a rough horizontal surface by a rope exerting a force at an angle. In regards to the work done by forces, it is crucial to consider both the direction of the force and the direction of the box's displacement. Work is done by a force when there is a component of the force in the direction of the displacement of the object it is acting upon.
The weight of the box and the normal force do no work in this scenario. This is because these forces act perpendicular to the horizontal displacement of the box. The rope's tension does have a horizontal component that does work, and the force of friction also does work as it opposes the motion along the direction of displacement. Therefore, the correct answer to this question is that the weight of the box (C) does no work on the box as it is pulled to the right.