Demonstrating Conical Pendulum Stable and Unstable States
| Autor: | Leonid Minkin, Daniel Sikes |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | The Physics Teacher. 59:474-476 |
| ISSN: | 1943-4928 0031-921X |
| DOI: | 10.1119/10.0006133 |
| Popis: | This article analyzes and experimentally verifies the stability behavior of the equilibrium states of a conical pendulum. An analysis of the motion presents that the equilibrium states of the pendulum are determined by the pendulum angular speed. For a given pendulum length there exists a critical angular speed that determines stability conditions. Experimental results obtained using a variable speed rotator confirm the relationship between angular speed and equilibrium state conditions. An initially at rest pendulum has a stable equilibrium position that is vertically hanging straight down; however, it is shown that when gradually increasing the speed of a mechanical rotator to approach and surpass the pendulum critical speed, the initial stable equilibrium state becomes unstable. Furthermore, the pendulum, now in an unstable equilibrium, moves to a new stable equilibrium position that did not exist at speeds below the critical speed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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