A metal spehere hangs by a thread. when the north of a bar magnet is brought near the sphere is strongly attracted to the magnet
1 answer:
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Answer:
The length of the rod for the condition on the question to be met is
Explanation:
The Diagram for this question is gotten from the first uploaded image
From the question we are told that
The mass of the rod is
The mass of each small bodies is
The moment of inertia of the three-body system with respect to the described axis is
The length of the rod is L
Generally the moment of inertia of this three-body system with respect to the described axis can be mathematically represented as
Where is the moment of inertia of the rod about the describe axis which is mathematically represented as
And the moment of inertia of the two small bodies which (from the diagram can be assumed as two small spheres) can be mathematically represented as
Thus
Hence
=>
substituting vales we have
