Descriptif
Classical Mechanics (PHY 201)
This course introduces students to the Lagrangian and Hamiltonian mechanics. The concepts of Newtonian mechanics are extended to a more abstract and general viewpoint. The course will mostly use examples from the dynamics and vibrations of mechanical systems, with progressively increasing complexity. Examples from other fields of physics will be also proposed (electromagnetism, astrophysics, chaos…)
After a reminder of the classical concepts of point mechanics, the course extends these concepts to the Lagrangian formalism and to the least action principle. The Lagrangian formalism will be used to describe the mechanics of rigid bodies. Lagrangian formalism will then be extended to the Hamiltonian mechanics which is at the core of quantum physics and other modern theories in physics. We will also present some extensions of Lagrangian and Hamiltonian mechanics to other fields of physics.
Upon completion of this course, students master equations and principles in analytical mechanics. They will be able to discuss the relevance of the chosen model, as well as derive and solve simple models taken from their environment.
Objectifs pédagogiques
- rigid-body mechanics: balance laws for energy, for linear and angular momentum
- variational principles in mechanics: Lagrangian mechanics (least-action principle), Hamiltonian mechanics
Diplôme(s) concerné(s)
Parcours de rattachement
Pour les étudiants du diplôme Bachelor of Science de l'Ecole polytechnique
Vous devez avoir validé l'équation suivante : UE MEC_1F001_EP
Format des notes
Numérique sur 20Littérale/grade américainPour les étudiants du diplôme Programmes d'échange internationaux
Vos modalités d'acquisition :
Grade will be a weighted average, calculated as follows;
- Efforts and involvement during the exercise classes (15%): Students are expected to have a learning-oriented attitude during the lecture, searching the exercises, asking questions when needed, help their fellows, etc.
- mid-term exam (40%)
- final exam (45%)
Final and mid-term exams are both written exam lasting 2 hours. All paper documents are allowed, including printouts and handwritten notes, but electronic devices (watches, calculators, computers) are forbidden.
Replacement and remedial exam will be oral exam, or written one if a large number of students are involved.
Le rattrapage est autorisé (Note de rattrapage conservée écrêtée à une note seuil de 10)La note obtenue rentre dans le calcul de votre GPA.
Pour les étudiants du diplôme Bachelor of Science de l'Ecole polytechnique
Le rattrapage est autorisé (Note de rattrapage conservée écrêtée à une note seuil de 10)- Crédits ECTS acquis : 5 ECTS
La note obtenue rentre dans le calcul de votre GPA.
Programme détaillé
Main concepts covered:
- Newtonian mechanics in non-inertial frames, iuncluding Coriolis and centrifugal forces)
- Lagrangian mechanics (generalized coordinates, extension fo the calculus of variation for functionals, Lagrangian and Euler-Lagrange equations, Lagrange multipliers)
- Rigid-body mechanics (center of mass, Euler angles, Moment of inertia and inertia tensor, Euler equation of motion)
- Dynamics: one-degree-of-freedom and coupled oscillators
- Introduction to Hamiltonian mechanics.