Abook is falling from the top shelf of a bookcase. which statement correctly describes the change in the energy of the book?
a. the potential energy and kinetic energy remain the same.
b. the potential energy decreases as kinetic energy increases.
c. the kinetic energy decreases as potential energy increases
d. the kinetic energy remains at zero, but potential energy increases.

Option (B) is the correct answer.

Explanation:

When the book was at the shelf, it had only potential energy as potential energy is the energy possessed due to the position of an object.

Therefore, when the book falls from the book shelf it gains kinetic energy as kinetic energy is the energy possessed due to the motion of an object.

Thus, when the books is falling from the top shelf then the motion of book increases therefore, we can conclude that the potential energy decreases as kinetic energy increases.