Many 2.5-inch (6.35-cm) computer hard disks spin at a constant 5400 rpm operating speed. The disks have a mass of about 7.50 g and are essentially uniform throughout with a very small hole at the center.
If they reach their operating speed 2.40 s after being turned on, what average torque does the disk drive supply to the disk during the acceleration? (Express your answer to two significant figures.)
Solution is in N⋅m