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homework and exercises - Differential equations of a forced coupled spring- pendulum system - Physics Stack Exchange
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Nonlinear Oscillations of a Spring Pendulum at the 1:1:2 Resonance by Normal Form Methods | SpringerLink
![Spring pendulum. Elastic and quasi-elastic forces. The equation of a vibrating spring. Mathematical and physical pendulums. Periods of oscillation of mathematical and physical pendulum. Reduced length of a physical pendulum Spring pendulum. Elastic and quasi-elastic forces. The equation of a vibrating spring. Mathematical and physical pendulums. Periods of oscillation of mathematical and physical pendulum. Reduced length of a physical pendulum](http://bog5.in.ua/lection/vibration_lect/image_vibr/clip_image002.jpg)
Spring pendulum. Elastic and quasi-elastic forces. The equation of a vibrating spring. Mathematical and physical pendulums. Periods of oscillation of mathematical and physical pendulum. Reduced length of a physical pendulum
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