A pulley is pictured to the right. Its moment of inertia is 3.14 kg-m². A massless rope is wound around the pulley at a radius of 0.125 m. Two envelopes are attached to the pulley, as indicated in the picture. The first envelope contains the physical representation of the benefits of taking PHYS 1800, weighing 20.05 kg. The second envelope contains the physical representation of the costs of taking PHYS 1800, weighing 5.42 kg. (Note: the benefits of taking PHYS 1800 outweigh the costs). Assuming no friction or air drag, what is the CcW angular acceleration of the pulley? Include units in SI.

A pulley is pictured to the right. Its moment of inertia is 3.14 kg-m². A massless rope is wound around the pulley at a radius of 0.125 m. Two envelopes are attached to the pulley, as indicated in the picture. The first envelope contains the physical representation of the benefits of taking PHYS 1800, weighing 20.05 kg. The second envelope contains the physical representation of the costs of taking PHYS 1800, weighing 5.42 kg. (Note: the benefits of taking PHYS 1800 outweigh the costs). Assuming no friction or air drag, what is the CcW angular acceleration of the pulley? Include units in SI.