Question: Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 24 J

Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 24 J and a potential energy with respect to the floor of 47 J.
(a) How does the book's kinetic energy and its potential energy change as it continues to fall? What is its total kinetic energy at the instant just before it strikes the floor? If a heavier book fell from the same shelf, would it have the same kinetic energy when it strikes the floor?

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