In light inextensible thread is suspended a heavy ball.

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Uploaded: 25.02.2014
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Description

In light inextensible thread is suspended a heavy ball. At what angle you need to take the thread from the equilibrium position, so that the following swing maximum strength thread tension was 3 times more than the minimum?

Additional information

Task 10640. Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.

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