OneDDL Posted July 13, 2021 Report Share Posted July 13, 2021 MP4 | Video: h264, 1280x720 | Audio: AAC, 44100 Hz Language: English | Size: 5.47 GB | Duration: 7h 5m What you'll learn How to tackle graduate-level problems in classical mechanics the kinematics of rigid bodies How to deal with non-inertial frames of reference How to calculate the angular velocity of a rigid body How to calculate the frequency of small oscillations How to analyze the dynamics of rigid bodies How to calculate the inertia matrix and moments of inertia How to construct a Lagrangian in classical mechanics The importance of the Lagrange formalism How to derive the Hamiltonian (energy) of a system Requirements how to calculate multiple integrals (this is necessary for the calculation for the moments of inertia for example) derivatives vector notation (dot and cross product) matrix multiplication Description This course is about solving advanced mechanics problems. This set of problems is taken from the first volume of the course of theoretical physics by Landau and Lifshitz. I have selected some problems from this book and provided a thorough step-by-step solution in the course; the solutions to these problems are also given in the book but they are usually quite terse, namely not many details are provided. Therefore, what we will do in the course is to first construct the necessary theory to deal with the problems, and then we will solve the problems. Some theory is also discussed while solving the problems themselves. Every single formula in this course is motivated/derived. We will start from the action principle, whose main constituent is the Lagrangian, which is fundamental to dealing with advanced problems in all branches of physics, even if we restrict ourselves to mechanics in this case. We will solve several problems related to how to construct a Lagrangian of a (possibly complex) system, and we will also derive the Hamiltonian from the Lagrangian, which represents the energy of a system, and do some problems on that. We will also study the kinematics of rigid bodies, and derive formulae for the velocities of points which belong to the bodies, as well as formulae for accelerations. Accelerations are important not just for kinematics, but also for the dynamics of rigid bodies. As regards the motion of rigid bodies, we will discuss the kinetic energy, which is necessary to obtain the Lagrangian, and solve several problems in three dimensions related to how to find the kinetic energy of a body in motion. The expression of the kinetic energy is dependent on the angular velocity (which is a concept that we will derive in kinematics), and also depends on the inertia matrix (or inertia tensor), which we will also derive. The formulae will be therefore written in a very general form, and this is useful when tackling difficult problems, since knowing a general method will provide the means to solve them. The inertia tensor will appear in the expression for the kinetic energy, and it will also appear in dynamics, in the formula for moments; we will see why it appears, and use the theory to solve problems. We will also discuss non-inertial frames, and find the deflection of a freely falling body from the vertical caused by the Earth's rotation (which makes the Earth a non-inertial frame). 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