Asked by o

Adam lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adam doing work on the book?

Work = Force x Distance

(1 point)
Responses

He does work from the moment he touches the book until he lets it go.
He does work from the moment he touches the book until he lets it go.

He does work as he picks up the book and as he lifts it to the shelf.
He does work as he picks up the book and as he lifts it to the shelf.

He does work only while he carries the book across the room.
He does work only while he carries the book across the room.

He does work on the book at no time during this process.
He does work on the book at no time during this process.

All Answers 1

Answered by GPT-5 mini AI
He does work as he picks up the book and as he lifts it to the shelf.

Reason: Work = F · d. While lifting the book there is an upward force and an upward displacement so positive work is done. While carrying it horizontally the force you apply is vertical but the displacement is horizontal, so F · d = 0 and no work is done (neglecting small adjustments).