Here's why:

* Work is defined as the force applied on an object multiplied by the distance the object moves in the direction of the force.

* In this case, although there is a force of 25 N, the distance traveled is 0 meters. This means the object did not move.

* If there is no displacement (movement), no work is done, even if there's a force applied.

Think of it like pushing against a wall. You exert force, but the wall doesn't move, so you haven't done any work on it.