Find the period of radial oscillation through effective potentials

Click For Summary
SUMMARY

The discussion centers on the calculation of the period of radial oscillation using effective potentials in a central force system. The effective potential is defined as Ueff(r) = U(r) + L^2/2mr^2, where L represents angular momentum. A key point of confusion arises regarding the treatment of angular momentum as a constant during differentiation of the effective potential, despite its dependence on the radial position r. It is established that angular momentum remains conserved in systems with only radial forces, allowing for changes in the radius without affecting the conservation principle.

PREREQUISITES
  • Understanding of effective potential in classical mechanics
  • Knowledge of angular momentum conservation laws
  • Familiarity with radial forces and their implications
  • Basic calculus for differentiation of functions
NEXT STEPS
  • Study the derivation of effective potentials in central force problems
  • Explore the implications of angular momentum conservation in non-linear systems
  • Investigate the relationship between radial forces and oscillatory motion
  • Learn about the mathematical treatment of variable parameters in physics
USEFUL FOR

This discussion is beneficial for physics students, particularly those studying classical mechanics, as well as educators and researchers focusing on central force dynamics and effective potential analysis.

Richardbryant
Messages
24
Reaction score
0

Homework Statement


Given circuit is a circle, force is a central force[/B]
Ueff(r)=U(r)+L^2/2mr^2

Homework Equations


the problem i find is, the angular momentum is a function of r
however, the solution when differentiate the effective potential, just treat angular momentum as a constant.
That's the point i am puzzle of, what is the physical sense of treating angular momentum as a constant? isn't it depends on the position r?

The Attempt at a Solution

 
Physics news on Phys.org
Angular momentum is conserved if there are only radial forces - the particle can change its radius, that is no problem.
 

Similar threads

  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
5
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K
Replies
13
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K