Final answer:
Lifting a box of books from the floor represents work in physics, while pushing hard against a wall for one minute does not.
Explanation:
In the context of physics, work is defined as force applied to an object to move it over a distance. Among the given examples, lifting a box of books from the floor represents work as defined in physics because the box is being moved vertically against gravity.
On the other hand, pushing hard against a wall for one minute does not involve work in the physics sense because there is no displacement of the object in the direction of the force.
Remember, for work to be done in physics, there must be both force applied and a displacement in the direction of that force.
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