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

* If an object remains stationary, it means it hasn't moved any distance.

* Since the distance is zero, even with a force of 20 N, the work done will be zero.

In simpler terms: You can push on a wall with all your might, but if the wall doesn't budge, you haven't done any work in the physics sense.