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Physics 20 Online
OpenStudy (anonymous):

When calculating the period of an oscillating pendulum, you get a real and complex answer. What does the complex one mean physically?

OpenStudy (vincent-lyon.fr):

The period is always real and positive. Do you mean complex solution for elongation? What type of equation are you referring to?

OpenStudy (anonymous):

Sorry, there was a mistake in my differential equation. I left out a -.

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