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A wheel is rotating with a speed of 500 ...

A wheel is rotating with a speed of `500` rpm on a shaft. Second identical wheel, initially at rest is suddenly coupled on the same shaft. What is the speed of the resultant combination ? Assume that the moment of inertia of the shaft is negligible.

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`I_(1)omega_(1)=I_(2)omega_(2)` `I_(1)n_(1)=I_(2)n_(2)`
`I_(1)(500)=2I_(1)n_(2)` `:.n_(2)=250` rpm
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