Question: 1.4.9. A flat circular disk of radius 1.0 m is rotated at an angular velocity of 0.65 rad/s over a fixed flat surface. An

1.4.9. A flat circular disk of radius 1.0 m is rotated at an angular velocity of 0.65 rad/s over a fixed flat surface. An oil film separates the disk and the surface. If the viscosity of the oil is 16 times that of water (20C) and the space between the disk and the fixed surface is 0.5 mm, determine the torque required to rotate the disk.

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