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Statement of a problem № 3249

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Two wheels of moment of inertia I1 and I2 are set in rotation with angular speed w1 and w2 . When they are coupled face to face they rotate with a common angular speed w due to frictional forces. Find (a) w and (b) work done by the frictional forces.

Solution:
Two wheels of moment of inertia I1  and I2  are set in rotation with angular spe

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