What is mechanics in physics?

Mechanics is a sub-discipline and key pillar of physics that relates to the study of matter and motion. It encompasses foundational areas like classical mechanics and statistical mechanics, which connect macroscopic observations to microscopic behavior. Classical mechanics can also be derived as a valid approximation from quantum mechanics at ordinary scales.

What we know

• Mechanics is included as a sub-discipline and relevant concept in the glossary of physics. [2]
• Statistical mechanics is a pillar of modern physics that relates macroscopic observations to microscopic parameters. [3]
• Classical mechanics can be derived from quantum mechanics as an approximation valid at ordinary scales. [4]

Where to go next

• how it workedHow does statistical mechanics explain the second law of thermodynamics?
• compared withWhat is the difference between classical systems and quantum systems?
• the bigger pictureWhat is the broader scope of physics as a natural science?
• whoHow did Ludwig Boltzmann contribute to theoretical physics?
• how we knowWhat role did Max Planck play in the development of quantum theory?
• an unexpected connectionHow did Ludwig Boltzmann connect microscopic states to macroscopic thermodynamics?Ludwig Boltzmann developed statistical mechanics to link macroscopic properties like temperature and pressure directly to microscopic fluctuations and the number of microstates.

Sources

• [1]glossary of terms in physics (Wikidata Q3772496) · CC0 1.0
• [2]Glossary of physics · CC BY-SA 4.0
• [3]Ludwig Boltzmann · CC BY-SA 4.0
• [4]Quantum mechanics · CC BY-SA 4.0
• [5]Outline of physics · CC BY-SA 4.0