If the nickel accidentally falls out of her pocket, what will happen to the gravitational potential energy (GPE) of the nickel as it falls to the ground

GPE decreases

Explanation:

As the nickel falls out of her pocket, its height would decrease. Since gravitational potential energy (GPE) is defined as the product of mass and gravitational constant g and the object heights, and mass and g stay constant while height decreases, its GPE must also decreases as well.