Question

Adita lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adita doing work on the book?
She does work on the book at no time during this process.
She does work only while she carries the book across the room.
She does work from the moment she touches the book until she lets it go.
She does work as she picks up the book and as she lifts it to the shelf.

Answer 1

option d

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Answer 2

Adita is doing work on the book when she picks up the book and she lifts it to the shelf.

Workdone is defined as the product of the force experienced by an object and the distance covered by the object.

Mathematically workdone = force * distance

The formula shows that for work to be done, an object must move through a distance.

Based on Adita motion, she is only doing work at the point where she picks up the book, moves a distance, and places it on a high shelf.

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