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Derivatives interpreted as fractions [duplicate]
So I was wondering if manipulating differential as fraction is fine.In Physics problems ,usually, what I see is if we have equations of magnetic field ,we consider a magnetic field caused by a small ...
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Equations of motions for a spin interacting with a magnetic field.
Consider the Lagrangian
$$L(\theta, \phi) = (-1+\cos \theta) \dot{\phi} + \mathbf{B}\cdot \mathbf{n}$$
Where $\mathbf{B}$ is a constant magnetic field and $\mathbf{n}$ denotes a point on the unit ...
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