A cylindrical bucket filled with watert ...

A cylindrical bucket filled with watert is whirled around in a vertical circle of radius r. What can be the minimum speed at the top of the path if water does not all out from the bucketgt? If it continues with this speed, what normal contact force the bucket exerts on water at teh lowest point of the path?

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The correct Answer is:

`sqrt(gr) 2Mg`

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