It is known that an aluminum bar breaks when it is subjected to a 25kN traction. One end of the bar is attached to a motor and the other to a steel ball with a mass of 55 kg. When the motor is started, the ball describes a horizontal circumference with a radius 5.0 m. If the engine speed is gradually increased, its rotation period gradually decreases as well. For what period of engine rotation does the bar break? Suppose the mass of the bar is negligible compared to the mass of the sphere and give your answer with 2 decimal places.

Question

It is known that an aluminum bar breaks when it is subjected to a 25kN traction. One end of the bar is attached to a motor and the other to a steel ball with a mass of 55 kg. When the motor is started, the ball describes a horizontal circumference with a radius
5.0 m. If the engine speed is gradually increased, its rotation period gradually decreases as well. For what period of engine rotation does the bar break? Suppose the mass of the bar is negligible compared to the
mass of the sphere and give your answer with 2 decimal places.

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