Лаг1989 задача №3.17

A weight of m = 0.5 kg, tied to a rubber cord with a length of L₀, describes in a horizontal plane. circle. The speed of movement of the weight corresponds to the rotation frequency n = 2ob / s The angle of deviation of the rubber cord. from a vertical of 30 °. Find the length of the unstretched rubber cord. Stretching the cord by 1 cm requires a force of 6N.

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