Monday, 16 June 2014 14:54

## D5-22: ROTATING PENDULUM

• ID Code: D5-22
• Purpose: Demonstrate the presence of a "critical parameter" which determines the dynamic behavior of a simple physical system.
• Description: Attach a mounting frame to a variable speed rotator with the length of the pendulum of 10 cm. Adjust the rotation rate to less than about 1.6 revolutions per second, and the bob will remain in stable equilibrium in the vertical position. For rotational rates greater than 1.6 revolutions per second, the stable equilibrium position of the bob will be non-zero, depending on the rotation rate. For angular speeds greater than 2 or 3 revolutions per second the pendulum is erratic. For angular speeds less than about 3 revolutions per second the presence of a non-zero stable equilibrium position is readily demonstrated. Adjusting the length of the pendulum will change the critical angular speed.
• Availability: Available
• Loc codes: D5, D1

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• #### D5-04: SPINNING BOOK

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• #### D5-06: FIDDLESTICK

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• #### D5-08: WINEGLASS AND OLIVE

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• #### D5-11: CORIOLIS EFFECT - BALL ON ROTATING PLATFORM

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• #### D5-12: CORIOLIS EFFECT - WATER JET

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• #### D5-13: FOCAULT PENDULUM - MODEL

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• #### D5-21: BALL ROLLING ON ROTATING DISC

Show that a sphere rolling on a rotating disc will move in circles Read More
• #### D5-22: ROTATING PENDULUM

Demonstrate the presence of a "critical parameter" which determines the dynamic behavior of a simple physical system Read More
• #### D5-23: ROTATING BEAD ON LOOP

Demonstrate the presence of a "critical parameter" which determines the dynamic behavior of a simple physical system Read More
• #### D5-24: ROTATING PENDULA - LENGTH VS. HEIGHT

Show that pendula of different length suspended from the same point rotating at the same angular speed rise to the Read More
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