Two large pendulums coupled with spring.

3A70.25 • B+15+0

diagram for demo

Iron Spheres coupled with weak Spring. The behavior of two coupled harmonic oscillators may be shown with a pair of heavy iron spheres coupled with a weak spring. With the two suspensions tuned to the same frequency, couple the spheres with the spring to demonstrate the two normal modes. One in which they oscillate in phase, and one in which they oscillate 180 degrees out of phase.

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Related Demos

3A70.10 Wilberforce pendulum: Oscillates between rotation and up-down. 3A70.20 Two pendulums on a frame of flexible steel. 3A70.35 Two balls hung on the same string, one in middle, one at the end. 3A70.31 Three large pendulums coupled with two springs.
B+15+5 Wilberforce pendulum: Oscillates between rotation and up-down. B+15+10 Two pendulums on a frame of flexible steel. B+15+15 Two balls hung on the same string, one in middle, one at the end. B+15+1 Three large pendulums coupled with two springs. B+15+20 5 Metronomes on board and cans sync their oscillations B+15+25 Applet: Normal Modes B+15+26 Coupled Oscillations Simulation