____ N of work are done on your physics text when you carry it horizontally across a 15 meter wide room.

zero. No work is done because for work to be done the force has to act in the direction of motion.

There is no elevation change and, presumably, not velocity change.

What do you think, in those circumstances?

To determine the work done on your physics textbook when carrying it horizontally across a 15 meter wide room, we need to use the formula for work:

Work (W) = Force (F) × Displacement (d) × cos(theta)

In this case, we are carrying the textbook horizontally, which means the angle between the force applied and the displacement is 0 degrees, resulting in cos(theta) = 1. Therefore, we can simplify the equation to:

Work (W) = Force (F) × Displacement (d)

To calculate the work done, we need to know the force applied to the textbook. Without this information, it is not possible to determine the numerical value of the work done (W).