How Does Young's Modulus Factor into Calculating Pendulum Swing Velocity?

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Homework Help Overview

The problem involves a pendulum consisting of a sphere attached to a steel wire, with a focus on calculating the velocity of the sphere at its lowest point. The context includes the application of Young's modulus, though the specific relevance to the problem is not fully explored.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the missing information necessary for solving the problem, particularly the point of release of the pendulum and its impact on the calculation of tension. There is an emphasis on the need for strain or changes in length to apply Young's modulus effectively.

Discussion Status

The discussion is ongoing, with participants identifying gaps in the problem statement and questioning the implications of these gaps on the calculations required. There is no consensus yet, but the dialogue is focused on clarifying assumptions and the necessary data for a complete solution.

Contextual Notes

Key information such as the angle of release for the pendulum and specific values for strain or changes in length are noted as missing, which are crucial for determining the tension in the wire and applying the relevant equations.

Abhishekdas
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Young's modulus question...

Homework Statement


A sphere of radius 10 cm and mass 25 kg is attached to the lower ends of a steel wire which is suspended from the ceiling of a room. the point of the support is 521 cm above the floor. When the sphere is set swinging as a simple pendulum, its lowest point just grazes the floor. Calculate the velocity of the ball at its lowest point.


Homework Equations





The Attempt at a Solution


I think some information is missing here...Either th strain or the initial length or change in length should be given so that i can calculate tension and hence equate it to mv2/r + mg...
 
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What's missing is the point of release of the pendulum.
 


Hi...PhanthomJay...

What is the use of the point of release? I thought if i had the tension in the wire somehow my job was done...As i said equate it to mv^2/r + mg...
 


Yes, and you don't have the tension, so, as you say, the problem is missing information, like is the pendulum released when it's 45 degrees from the negative y axis, or is it 10 degrees, or 5 degrees, etc. ? That is the missing data.
 


Ya...right...
 

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