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Rigid body rotation and moment of inertia

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A rotating door is made from fr rectangular glass panes, as shown in the drawing. The mass of each pane is 79 kg. A person pushes on the outer edge of one pane with a force of F = 78 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular acceleration.

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This is a great example illustrating the use of the principles of Rigid body rotation. I have provided step-by-step solution in an easy to understand manner.

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