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JEE Main 26 Feb 2021 Shift 2 Solved Paper

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Question : 7

Total: 89

A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about it is I. A weight mg is attached to the cord at the end. The weight falls from rest. After falling through a distance h, the square of angular velocity of wheel will be

[26 Feb 2021 Shift 2]

‌
2mgh
1+2mr2
‌
2mgh
1+mr2
2gh
‌
2gh
1+mr2

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