Question

What are the energy inputs and outputs for the book hitting the floor?

A) Frictional heat of the floor, air, and book, and sound energy
B) Gravitational potential energy and kinetic energy
C) Light energy passing through the vacuum of space
D) Heat energy and work energy

What is the valid qualitative equation that includes all the input and output energies involved in the book hitting the floor?

A) Frictional heat energy + sound energy = gravitational potential energy
B) Kinetic energy + gravitational potential energy = frictional heat energy + sound energy
C) Light energy + work energy = heat energy
D) Gravitational potential energy + kinetic energy = heat energy + sound energy

Answer 1

The valid qualitative equation that includes all the input and output energies involved in the book hitting the floor is D) Gravitational potential energy + kinetic energy = heat energy + sound energy.

Step-by-step explanation:

The valid qualitative equation that includes all the input and output energies involved in the book hitting the floor is D) Gravitational potential energy + kinetic energy = heat energy + sound energy.

When a book hits the floor, the initial gravitational potential energy of the book is converted into kinetic energy as it falls. Upon colliding with the floor, some of the kinetic energy is converted into heat energy due to frictional heat between the book and the floor, and into sound energy as the collision produces sound waves.