1.

A cord is wound round the circumference of a wheel of radius r. The axis of the wheel is horizontal and its moment of inertia about this axis is I. A weight mg is attached to the end of the cord and is allowed to fall from rest. The angular velocity of the wheel, when the weight has fallen through a distance h, is

Answer»

`[(2gh)/(l+mr)]^(1//2)`
`[(2mgh)/(I+mr^(2))]^(1//2)`
`[(2mgh)/(1+2mr^(2))]^(1//2)`
`(2gh)^(1//2)`

ANSWER :B


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