Задача id11912

A rod with a mass of 3 kg is suspended at its ends by two threads; the length of the threads is small compared to the length of the rod. One drink is cut. At what angle of rotation of the rod will the second thread break if it can withstand a maximum load of 20 N? Assume that g=10 m/s2. Consider the second suspension point to be practically motionless.

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