# Problem: Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 29 J and a potential energy with respect to the floor of 46 J.What was the initial potential energy of the book, and what is its total kinetic energy at the instant just before it strikes the floor?

###### FREE Expert Solution

Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 29 J and a potential energy with respect to the floor of 46 J.

What was the initial potential energy of the book, and what is its total kinetic energy at the instant just before it strikes the floor?

Total E

Kinetic energy → energy of motion

$\overline{)\mathbf{K}\mathbf{.}\mathbf{E}\mathbf{.}\mathbf{=}\frac{\mathbf{1}}{\mathbf{2}}{\mathbf{mv}}^{\mathbf{2}}}$

Potential energy → stored energy, by virtue of its position ###### Problem Details

Imagine a book that is falling from a shelf. At a particular moment during its fall, the book has a kinetic energy of 29 J and a potential energy with respect to the floor of 46 J.

What was the initial potential energy of the book, and what is its total kinetic energy at the instant just before it strikes the floor?