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A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 91 kg. A person pushes on the outer edge of one pane with a force of F = 58 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration.

OK, so equations...

F sub T = mass * alpha sub T,

and alpha sub T = radius * angular accel

So if I try to apply 58N as the tangential force and 364kg as the mass, and solve for alpha sub T, why can't I divide alpha sub T by the radius of the door and get the answer? :yuck:

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# Angular acceleration

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