classical mechanics

[saidsamir]

Mechanics can also be divided into solid mechanics and fluid mechanics (known together as continuum mechanics), the latter including such branches as hydrostatics, hydrodynamics, aerodynamics, and pneumatics. Acoustics is the study of how sound is produced, controlled, transmitted and received. Important modern branches of acoustics include ultrasound, the study of high-frequency sound waves beyond the range of human hearing; Bioacoustics, the physics of animal calls and hearing, electroacoustics, and the manipulation of audible sound waves using electronics. Optics, which is the study of light, relates not only to visible light but also infrared and ultraviolet light, which show all phenomena of visible light except vision, for example, reflection, refraction, interference, diffraction, scattering, and polarization of light. Heat is a form of energy, the internal energy possessed by the particles that make up matter; Thermodynamics deals with the relationships between heat and other forms of energy. Electricity and magnetism have been studied as one branch of physics since their close relationship was discovered in the early 19th century; An electric current creates a magnetic field, and a changing magnetic field creates an electric current. Electrostatics deals with electric charges at rest, electrodynamics with charges in motion, and magnetoelectrics with resting magnetic poles.



classical mechanics
Main articles: Classical mechanics, Lagrangian mechanics, and Hamiltonian mechanics

A picture of Newton's pendulum, a system that illustrates a basic concept in classical mechanics represented in the principle of conservation of momentum and energy.

translated from

التربية البدنية والدفاع عن النفس اول ابتدائي