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A uniform solid cylinder A of mass m1 ca...

A uniform solid cylinder A of mass `m_1` can freely rotate about a horizontal axis fixed to a mount B of mass `m_2`(figure). A constant horizontal force F is applied to the end K of a light thread tightly wound on the cylinder. The friction between the mount and the supporting horizontal plane is assumed to be absent. Find:
(a) the acceleration of the point K,
(b) the kinetic energy of this system t seconds after the beginning of motion.

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