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Problem 5: The motion of the uniform 40-kg garage dooris guided at its ends by the track. If it is released from restt e = 0°, determine the door's angular

velocity at the instant 8 30°. The spring is originally stretched 0.3 m when the door is held open at 0 = 0°. Assume the door can be treated as a thin plate, and there is a spring and pulley system on each of the two sides of the door.

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