CBSE Class 11-science Answered
A can filled with water isrevolved in a vertical circle of radius 4 metre and the water just does no
Asked by kaka001 | 17 Nov, 2009, 10:32: PM
Expert Answer
Yes, it's a valid point.
We have calculated a time period of 4 seconds based on assumption, that what if all the way along the speed is constant and equal to 
(Rg). But in fact it's not, and some path is travelled with a greater speed. This argument suggests the actual time period less than the calculated with constant "Minimum speed" assumption.
Hence the correct answer is 1 sec.
We regret for the overlooking of obvious fact.
Regards,
Team,
TopperLearning.
Answered by | 18 Nov, 2009, 11:20: PM
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