Задача id12712

A ball with mass m = 100 g is suspended on a thin thread. The strength of the thread (the maximum load it can withstand) f0 = 1.96 n. Determine the minimum angle at which the thread must be deflected from the vertical so that after the ball is released, the thread breaks when the ball passes through the equilibrium position. At what strength of thread will the ball not break even with an initial deflection of 90°?

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