Final answer:
The net force acting on the wooden board is the same as the force applied by Student 1, which is 10N, because no other forces are mentioned.
Step-by-step explanation:
The student asks about the net force acting on a wooden board. When a force is applied to an object and no other forces are mentioned, the net force is equal to the force applied. Since Student 1 applies a force of 10N to slide the wooden board across the table and no other forces are specified (such as friction or an opposing force from Student 2), the net force on the board is simply the force applied by Student 1.
Therefore, the net force acting on the wooden board is 10N, making option B) the correct answer.