Lagrangian mechanics

E155679

Lagrangian mechanics is a reformulation of classical mechanics that uses energy-based principles and the calculus of variations to derive the equations of motion for physical systems.

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Predicate Object
instanceOf formulation of classical mechanics
theoretical framework in physics
advantage coordinate-independent formulation
handles constraints systematically
naturally uses generalized coordinates
appliesTo continuous media
fields
particles
rigid bodies
assumes deterministic dynamics
time evolution from stationary action
basedOn calculus of variations
principle of least action
coreQuantity kinetic energy
potential energy
defines Lagrangian as kinetic energy minus potential energy
derives equations of motion
developedInCentury 18th century
fieldOfStudy classical mechanics
generalizes Newtonian mechanics
historicalFigure Joseph-Louis Lagrange
influenced general relativity
quantum field theory
mathematicalTool differential equations
functional derivatives
relatedTo Hamiltonian mechanics
analytical mechanics
quantum mechanics
typicalEquation Euler–Lagrange equation d/dt(∂L/∂q̇) − ∂L/∂q = 0
usedIn astrophysics
engineering dynamics
particle physics
usesConcept Euler–Lagrange equation
surface form: Euler–Lagrange equations

Hamiltonian function
Lagrange multipliers
Lagrangian function
Noether's theorem
action functional
conjugate momenta
conservation laws
constraints
generalized coordinates
generalized velocities
holonomic constraints
nonholonomic constraints
symmetry
viewpoint energy-based formulation
variational principle formulation

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Referenced by (12)

Full triples — surface form annotated when it differs from this entity's canonical label.

Joseph-Louis Lagrange knownFor Lagrangian mechanics
Noether's theorem appliesTo Lagrangian mechanics
this entity surface form: Lagrangian systems
Euler–Lagrange equation field Lagrangian mechanics
Euler–Lagrange equation relatedTo Lagrangian mechanics
principle of least action coreConceptOf Lagrangian mechanics
Lagrange multipliers relatedTo Lagrangian mechanics
"Invariante Variationsprobleme" appliesTo Lagrangian mechanics
subject surface form: Invariante Variationsprobleme
d’Alembert’s principle relatedTo Lagrangian mechanics
d’Alembert’s principle consequence Lagrangian mechanics
this entity surface form: leads to Lagrange’s equations of the first kind
Hamilton–Jacobi equation relatedTo Lagrangian mechanics
Lissajous orbit isRelatedTo Lagrangian mechanics
this entity surface form: Lagrangian dynamics
Hamiltonian mechanics relatedTo Lagrangian mechanics