Work is defined as the product of force and the displacement in the direction of the force. The formula for calculating work \( W \) is:
\[ W = F \times d \times \cos(\theta) \]
where:
- \( W \) is the work done,
- \( F \) is the force applied,
- \( d \) is the displacement in the direction of the force,
- \( \theta \) is the angle between the force and the direction of displacement.
In this case, although the person is applying a force of 500 newtons against the wall, the wall does not move, which means the displacement \( d \) is 0 meters. Since the displacement is 0, any force applied to the wall does not result in work being done.
Therefore, the work done by the person is:
\[ W = 500 , \text{N} \times 0 , \text{m} \times \cos(\theta) = 0 , \text{joules} \]
So, the correct response is:
0 joules.