In which case was more work done on the box by the 4.0 N force?

Question

A box is supported by a 4.0 N vertical force and carried 2.1 m horizontally across a room at constant speed. Then, the same box is pushed 2.1 m horizontally across a smooth table (smooth enough to ignore friction) by a 4.0 N horizontal force. In which case was more work done on the box by the 4.0 N force?

-More work was done when the box was pushed across the table.

-More work was done when the box was carried across the room.    

-The work was the same in each case, since the force and distance were of equal magnitudes in both situations.

Answer 1

When the box is carried, the 4.0 N force performs no work, because it is perpendicular to the direction of movement.

But when it pushes the box across the table, it performs positive work, because it acts in the direction of movement.