1.

A flywheel rotating about a fixed axis has a K.E. of 360 J, when its angular speed is 30 rad s^(-1). The M.I. of the flywheel about the axis of rotation is :

Answer»

`0.15kgm^(2)`
`0.8kgm^(2)`
`0.6kgm^(2)`
`0.75kgm^(2)`

Solution :`E_(rot)=(1)/(2)IOMEGA^(2)360(1)/(2)I(30)^(2)`
implies `I=(720)/(900)=0.8kgm^(2)`


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