FIGURE CP8.69 FIGURE CP8.70 70. IL A 500 g steel block rotates on a steel table while attached to a 1.2-m-long hollow tube as shown in FIGURE CP8.70. Compressed air fed through the tube and ejected...

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Extracted text: FIGURE CP8.69 FIGURE CP8.70 70. IL A 500 g steel block rotates on a steel table while attached to a 1.2-m-long hollow tube as shown in FIGURE CP8.70. Compressed air fed through the tube and ejected from a nozzle on the back of the block exerts a thrust force of 4.0 N perpendicular to the tube. bas be


Extracted text: Exercises and Problems 203 onical The maximum tension the tube can withstand without breaking vith a is 50 N. If the block starts from rest, how many revolutions does °. He it make before the tube breaks? negli- 71. I|I If a vertical cylinder of water (or any other liquid) rotates same about its axis, as shown in FIGURE CP8.71, the surface forms a smooth curve. Assuming that the water rotates as a unit (i.e., all the water rotates with the same angular velocity), show that ght y n for the shape of the surface is a parabola described by the equation z = (w³/2g)r² Each particle of water on the surface is subject to only nd the normal force due to the water ays, acts perpendicular