理论力学

Hamiltonian Mechanics Sequence   Lagrangian and Hamiltonian Mechanics 视频   笔记 Newton's Approach 物体受到重力\(  mg\)和tension \(T\),牛顿力学告诉我们the equation of motion\(\sum \vec{F}=m \vec{a}\),则是一个vector equation,但是我们只需要关注tangential component—that is, the component of the force and acceleration along the circle where the particle is constrained to move. $$\begin{array}{l} m \ddot{s}=-m g \sin \theta \\ s=l…

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