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October 16th, 2011, 06:14 AM   #1
Joined: Sep 2011

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A pendulum+weight problem!

Alright, here is the question: the string of the pendulum has a lenght of L and there is a small weight at the end of it. At the height of L/3 there is stick. The actual question is: how big should ?o be so that the weight would swing around the stick without the string loosening?

Here's what I can think of: the tension of the string, let's say T, should be zero when the weight reaches the height of 2L/3. And the potential energy turns into potential and kinetic energy? Any help is welcome! : D

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pendulum, problem, weight

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