A heavy object falls from a certain point above the trampoline, bounces off the trampoline and rises. Please tell us how the mechanical energy is transformed in this process.

The process in which a heavy object falls from a point above the trampoline just before it touches the trampoline, and the potential energy of gravity is converted into kinetic energy; Kinetic energy is converted into elastic potential energy during the process from the contact of heavy objects with trampoline to the maximum elastic deformation of trampoline. In the process of trampoline returning to its original state, elastic potential energy is converted into kinetic energy; When a heavy object leaves the trampoline and rises to the highest point, kinetic energy is converted into gravitational potential energy.