7. A 2 kg mass is attached at the end of a cord 1 m long and whirled in the vertical plane. Find the greatest speed at which the tension in the cord just disappears. What would be the maximum tension in the cord at a speed of 4 rev/s? ma mg F mg. ma

7. A 2 kg mass is attached at the end of a cord 1 m long and whirled in the vertical plane. Find the greatest speed at which the tension in the cord just disappears. What would be the maximum tension in the cord at a speed of 4 rev/s? ma mg F mg. ma

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

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7. A 2 kg mass is attached at the end of a cord 1 m long and whirled in the vertical plane. Find
the greatest speed at which the tension in the cord just disappears. What would be the
maximum tension in the cord at a speed of 4 rev/s?
ma
mg
F
mg.
ma

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