What fraction of original rotational kineticenergy lost

Reference no: EM13670460

A wheel is rotating freely at angular speed 400 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and with 4 times the rotational inertia of the first, is suddenly coupled to the same shaft.

(a) Find the angular speed of the resultant combination of the shaft and two wheels?

(b) Find what fraction of the original rotational kinetic energy is lost?

Reference no: EM13670460

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