What are the differences between mechanics and thermodynamics?

(N/A) Mechanics deals with the motion of particles or bodies under the action of forces and torques. It focuses on the mechanical state of a system,such as its position,velocity,and kinetic energy.
Thermodynamics,on the other hand,is concerned with the internal macroscopic state of a system,defined by state variables like pressure,volume,and temperature. It does not focus on the motion of the system as a whole.
For example,when a bullet is fired from a gun,its mechanical state (kinetic energy) changes. However,when the bullet hits a piece of wood and stops,its kinetic energy is converted into internal energy (heat),which changes the temperature of both the bullet and the wood.
In summary,temperature is related to the energy of the internal,disordered motion of particles,whereas mechanics is concerned with the ordered motion of the system as a whole.