How do I solve for the Hamilton-Jacobi equation in a spherical forcefield?

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SUMMARY

The Hamilton-Jacobi equation for a particle of mass m in a spherical forcefield with potential V = - (K cos θ)/r² can be derived using the Hamiltonian H = (pr² / 2m) + (pθ² / 2mr²) + (pφ² / 2mr²sin²θ) + V. The key to solving this problem lies in understanding the relationship between kinetic energy T and potential energy V, specifically how to apply the equation of motion, d(pi)/dt = -∂U/∂xi, to derive the necessary equations. This exercise is foundational for those studying classical mechanics and the application of Hamiltonian dynamics.

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Homework Statement


A particle of mass m moves in the forcefield whose potential in spherical coordinates is V= - (K cos θ)/r2
Whrite the Hamilton-Jacobi equation describing its motion.

Homework Equations


H=(pr2 / 2m)+ (pθ2 / 2mr2)+(pφ2 / 2mr2sin 2θ) + V

The Attempt at a Solution


I don't know how to do it because it's the first exercise of its kind to I have to solve
 
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If kinetic energy is ##T(\dot{x}_i)## only and potential energy is ##V(x_i)## only, then:
$$ \frac{d\mathbf{p}_i}{dt} = -\frac{\partial{U}}{\partial{x}_i} $$
and think about what is the partial derivation on some direction. U is the potential energy.
 

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