Physics, fire has never imploded skyscrapers before 9/11 or after. Look at the videos, WTC building 7 is a controlled demolition. Watch the videos and look for the squibs. Look at the lack of friction as the building free falls.
There were no “controlled demolitions” of any World Trade Center buildings on September 11, 2001.
Study of vibration, noise, harshness, heat differentials, thrust, bearing loads, and stress - to name a few - will help a person to understand that a variety of “physics” failures lead to other events and failures.