A 100-kg solid cylindrical disk, 800 mm in diameter, is to be raised over a 200-mm obstruction. A cable is wrapped around the disk and pulled with a constant horizontal force T as shown. Knowing that the disk rotates about the corner of the obstruction and that the angular velocity of the disk is 1 rad/s when it has reached the top of the obstruction, determine the force T.

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200 mm T A OG B Fig. P17.25 and P17.26 800 mm