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A horizontally oriented copper rod of length l= 1.0 m is rotated about a vertical axis passing through its middle.

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A horizontally oriented copper rod of length l= 1.0 m is rotated about a vertical axis passing through its middle. What is the number of rps at which this rod ruptures?

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Let us consider an element of rod at a distance x from its rotation axis (Fig.). From Newton’s second law in projection form directed towards the rotation axis

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