Asked by Sigma
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 on the book at no time during this process.
He does work on the book at no time during this process.
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 only while he carries the book across the room.
He does work only while he carries the book across the room.
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.
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.
Explanation: Work = F·d (force dot displacement). While lifting, his upward force and upward displacement give positive work (increasing gravitational potential energy). While carrying it horizontally at constant height, his upward force is perpendicular to the horizontal displacement, so it does no work.
Explanation: Work = F·d (force dot displacement). While lifting, his upward force and upward displacement give positive work (increasing gravitational potential energy). While carrying it horizontally at constant height, his upward force is perpendicular to the horizontal displacement, so it does no work.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.