The door is made from one piece, whose ends move along the horizontal and vertical
Chapter 18, Problem 18-65(choose chapter or problem)
The door is made from one piece, whose ends move along the horizontal and vertical tracks. If the door is in the open position, \(\theta = 0^{\circ}\), and then released, determine its angular velocity at the instant \(\theta = 30^{\circ}\). Assume the door is a 180-lb thin plate having a width of 10 ft.
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