Title: Relativistic mechanics - Wikipedia
Headings: Relativistic mechanics
Relativistic mechanics
Contents
Relativistic kinematics
Relativistic dynamics
Rest mass and relativistic mass
Relativistic energy and momentum
Mass–energy equivalence
The mass of systems and conservation of invariant mass
Closed (isolated) systems
Chemical and nuclear reactions
Center of momentum frame
Angular momentum
Force
Torque
Kinetic energy
Newtonian limit
See also
References
Notes
Further reading
General scope and special/general relativity
General relativity

Content: Relativistic mechanics - Wikipedia
Relativistic mechanics
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Theory of motion and forces for objects close to the speed of light
Further information: Mass in special relativity and Conservation of energy
In physics, relativistic mechanics refers to mechanics compatible with special relativity (SR) and general relativity (GR). It provides a non- quantum mechanical description of a system of particles, or of a fluid, in cases where the velocities of moving objects are comparable to the speed of light c. As a result, classical mechanics is extended correctly to particles traveling at high velocities and energies, and provides a consistent inclusion of electromagnetism with the mechanics of particles. This was not possible in Galilean relativity, where it would be permitted for particles and light to travel at any speed, including faster than light. The foundations of relativistic mechanics are the postulates of special relativity and general relativity. The unification of SR with quantum mechanics is relativistic quantum mechanics, while attempts for that of GR is quantum gravity, an unsolved problem in physics . As with classical mechanics, the subject can be divided into " kinematics "; the description of motion by specifying positions, velocities and accelerations, and " dynamics "; a full description by considering energies, momenta, and angular momenta and their conservation laws, and forces acting on particles or exerted by particles. There is however a subtlety;