The word thermodynamics is in the phrase "the second law of thermodynamics for a reason" That law says nothing about boulders or potential energy.
STEP RIGHT UP and tell us all how ignorant you are on the topic of thermodynamics... You clearly don't have the first clue. Here is a primer intended for students going into the hard sciences to give them a handle on the basics of thermodynamics.
ENERGY AND THERMODYNAMICS (Biology)
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A hands-on module designed to give biology, chemistry, and physics students concrete experiences related to the concepts of thermodynamics.
Page 4 clip: Energy: is the ability to do work or bring about a change What is the study of energy called? thermodynamics
Following that statement is a chart..it describes the two states of energy and shows examples...The two states are kinetic energy and potential energy. Under the heading of kinetic energy is listed the energy of motion and examples are thermal, light, and electrical energy...under the heading of potential energy is listed Energy of position or stored energy...examples are chemical, gradient, and gravitational energy.
Next is shows a cube on an incline...at the top of the incline the cube is described as potential energy...as the cube moves down the incline, it is described as kinetic energy...this also applies to boulders at the top of a hill, or water running downhill.
Bottom line...ALL energy obeys the 2nd law of thermodynamics and it speaks to all energy...whether it is radiant energy from a heater, a hot wheels car rolling down the track, an electron moving along the wiring in your home, water running down a stream, or stored behind a dam, or sugar stored in carbohydrates...it all represents energy and is governed by the 2nd law of thermodynamics...
The very idea that thermodynamics only to thermal energy has to be one of the stupidest statements you have made yet...at this point, you may as well admit it..you have never taken a class in thermodynamics..even at the high school level as the first thing you would have learned is that the laws of thermodynamics speak to all energy in all forms.
Once more I am laughing in your face...and curious as to whether ian will step in to correct you on your gross misunderstanding of what thermodynamics is.