Question

How can we calculate the change in potential energy?

Answer 1

Potential energy is the amount of energy stored in an object before it is released.
Calculate object's initial potential energy using the following equation:
Potential Energy (PE) = mass $\times$ gravity $\times$ height.
Use the height and mass you measured along with 9.8 m/$s^2$ as the constant for gravity.
Determine the object's final height and mass.

Use the following equation to determine the change in potential energy:

Change in PE = Final PE - Initial PE.