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**Unformatted text preview: **Ra = , and the friction force f that causes this torque acts in the x-direction. The equations to solve are then , R , , cm = =--= a I fR kx f Ma x Which are solved for , ) 2 3 ( 2 x M k R I M kx a x-= + = where 2 cm ) 2 1 ( MR I I = = has been used for the combination of cylinders. Comparison with Eq. (13.8) gives . 2 3 2 2 k M T = =...

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