Question

Steven holds a book above the floor. He lets go of the book and the book speeds up as it falls to the floor. Which of the following forms ofenergy are involved in an energy transformation while the book is falling?

Answer 1

Both potential energy and kinetic energy are involved. As the book is falling, its potential energy decreases, and its kinetic energy increases.

Step-by-step explanation:

The potential energy depends on the height of the book, when the book decreases its height, the potential energy decreases.

The kinetic energy depends on the speed, when the book increases its speed, the kinetic energy increases.

Then, when the book is falling, the height is decreasing and the speed is increasing. It means that the potential energy is decreasing and the kinetic energy is increasing. So, the answer is:

Both potential energy and kinetic energy are involved. As the book is falling, its potential energy decreases, and its kinetic energy increases.