Solving the Pendulum Problem: An Overview

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Homework Help Overview

The discussion revolves around a pendulum problem presented in a physics class, focusing on the application of variables rather than numerical values. Participants are exploring the dynamics involved when the string of the pendulum goes slack and the subsequent motion of the particle.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants are considering the use of total work equations, including kinetic and potential energy, as well as the implications of a force diagram at the moment the string goes slack. There are inquiries about the nature of the motion after the string becomes slack, with references to projectile motion.

Discussion Status

The discussion is ongoing, with participants sharing their thoughts on potential approaches and clarifying concepts related to energy and forces. Some guidance has been offered regarding the treatment of the particle as undergoing free fall once the string is slack, but no consensus has been reached on a complete solution.

Contextual Notes

Participants have noted that their coursework typically emphasizes variables over numerical calculations, which may influence their approach to the problem. There is also an acknowledgment of the complexity introduced when the string goes slack.

tapeworm
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Homework Statement



I attached a picture of the problem given. In my physics class we never work with numbers we always work with variables.

IMG_0001-1.jpg


Here is a link as well.
http://i10.photobucket.com/albums/a133/TOmaynardOL/IMG_0001-1.jpg



Homework Equations



I have yet to tackle this problem, but I am thinking about using the total work equations. (kinetic, potential, work due to spring etc)


The Attempt at a Solution



As stated above, not yet done, but working on an approach before I go head first going about it all wrong.


Thanks in advance!
 
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Hi tapeworm,

tapeworm said:

Homework Statement



I attached a picture of the problem given. In my physics class we never work with numbers we always work with variables.

IMG_0001-1.jpg


Here is a link as well.
http://i10.photobucket.com/albums/a133/TOmaynardOL/IMG_0001-1.jpg



Homework Equations



I have yet to tackle this problem, but I am thinking about using the total work equations. (kinetic, potential, work due to spring etc)

Using energy relationships sounds like a good idea; also, you might consider a force diagram at the point where the string goes slack.
 
Im stuck, any suggestions? (when string goes slack) (projectile motion?)
 
tapeworm said:
Im stuck, any suggestions? (when string goes slack) (projectile motion?)

That looks right to me; after the string becomes slack, the only force acting on the particle is gravity so it is in free fall, and you can treat it as projectile motion.
 

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