Question in mechanics (Stuck in Section B)

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The discussion revolves around a homework problem in mechanics, specifically focusing on sections of a physics assignment. The user has completed the first section and believes they have solved the second but seeks confirmation and assistance with the remaining sections. They express uncertainty regarding the application of conservation of momentum, particularly concerning the mass involved in the problem. The request emphasizes the need for others to post their solutions to verify correctness and provide guidance. Clear communication of solutions using symbolic names is encouraged for effective collaboration.
eli meril
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Homework Statement


I solved the first section.
The second section true I think.
I solved but I want you to tell me that .
And the other sections that I do not already know how to solve them, if someone can target me?

Homework Equations


in the poto 2-5.
but 5 and 4 less relevant that the others .

The Attempt at a Solution


at section 2 Conservation of momentum .
I have doubts about the little mass to be considered
 

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Hint: The bead accelerates along the "rainbow" portion.
 
It's does not help me so mach.
I do not know if you refer to the circle or do simple momentum conservation.
 
It's does not help me so mach.
I do not know if you refer to the circle or do simple momentum conservation.
 
eli meril said:
The second section true I think.
I solved but I want you to tell me that .
Please post your solution and working. Use only the symbolic names given (m, M etc.); please do not substitute any numerical values.
 
So do you need help with question number 3?
If you want to know if your answers for 1 and 2 is correct you need to post your solution here.
 
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