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Homework Statement
Homework Equations
The Attempt at a Solution
I tried with the conservation laws. Angular momentum conservation won't work. To use energy conservation, I need the force pulling up the string but I don't have it. The force in the given case is tension but the tension continuously changes and I am not sure if the tension force is the conservative one. I don't have any idea about how to start making the equations. :(
Any help is appreciated. Thanks!
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