A wheel is rotating freely with an angular speed of 800 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with twice the rotational inertia of the first, is suddenly coupled to the same shaft. What is the angular speed in rev/min of the resultant combination of the shaft and two wheels? What fraction of the original rotational kinetic energy is lost?(adsbygoogle = window.adsbygoogle || []).push({});

I don't know what "coupled to the shaft" means. How are they connected?

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# Homework Help: Angular Momentum of a wheel

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