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2. A rotating disk of radius 0.20m is mounted on a frictionless horizontal axis. The rotational inertia of the disk about the axis is 0.055kgm2.

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2. A rotating disk of radius 0.20m is mounted on a frictionless horizontal axis. The rotational inertia of the disk about the axis is 0.055kgm2. A light string wrapped around the disk is attached to a 2.5kg block that sides on a horizontal frictionless surface. If the horizontal force of magnitude F=5.0N is applied to the block as shown in the figure below, what is the magnitude of angular acceleration of the rotating disk? Assume the string does not slip. (8 pts)

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