You are working in a library, re-shelving books. You lift a book from the floor to the

Question:

You are working in a library, re-shelving books. You lift a book from the floor to the top shelf. The kinetic energy of the book on the floor was zero, and the kinetic energy of the book on the top shelf is zero, so there is no change in kinetic energy. Yet you did some work in lifting the book. Is the work€“kinetic energy theorem violated?

You are working in a library, re-shelving books. You lift