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zorro
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Homework Statement
A ring of mass m free to slide on a fixed smooth horizontal wire is attached to one end of a string of length 60cm. The other end of the string is attached to a particle of mass 2m. The ring and the particle are initially held at the same horizontal level with the string taut. If the system is now released, find the angular velocity of the string when it makes an angle of 60 degrees with the vertical.
Homework Equations
conservation of momentum and energy
The Attempt at a Solution
When the string makes an angle 60 degrees with the vertical,
momentum in horizontal direction is conserved...
2mv=mu
i.e. u=2v...where v is the horizontal component of velocity of mass 2m
I am not getting the concept after this. Please help