Problem 8.62 A 600 g steel block rotates on a steel table while attached to a 1.20m long hollow tube. Compressed air fed through the tube and ejected from a nozzle on the back of the block exerts a thrust force of 4.81 N perpendicular to the tube. The maximum tension the tube can withstand without breaking is 60.0 N . Assume the coefficient of kinetic friction between steel block and steel table is 0.60. Air 1.2 m Tube Pivot Part A If the block starts from rest, how many revolutions does it make before the tube breaks