Question

a book is lifted to a higher shelf. which type of energy has a net change?

Explanation:

Step1: Recall energy - related concepts

When a book is lifted to a higher shelf, its height above the ground increases. Kinetic energy ($KE=\frac{1}{2}mv^{2}$) depends on the speed of the object. If the book is lifted at a constant speed or is at rest initially and finally, its speed $v$ does not change significantly, so the change in kinetic energy $\Delta KE = 0$ (assuming no change in speed during the lifting process). Potential energy ($PE = mgh$, where $m$ is mass, $g$ is the acceleration due to gravity, and $h$ is height) is related to the height of the object in a gravitational - field. As the height $h$ of the book increases, its gravitational potential energy increases. The work done in lifting the book is converted into gravitational potential energy. The total mechanical energy $E=KE + PE$. Since $KE$ is constant (or changes minimally if we consider the very short time of acceleration and deceleration during lifting as negligible), the net change is in potential energy.

Answer:

Potential energy