Find Spring Position After Attaching 2.7kg Mass

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Homework Help Overview

The problem involves a vertical spring with a spring constant of 47 N/m and a 2.7 kg mass attached to it. The original position of the spring is noted at the 15 cm mark on a ruler, and the question seeks to determine the new position of the spring after the mass is added.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need to convert measurements from centimeters to meters and question the extension of the spring due to the attached mass. There is confusion regarding the calculations leading to the position of the spring after the mass is added.

Discussion Status

Multiple participants express uncertainty about the correctness of their calculations, with some indicating they arrived at the same position of 141 cm but suspect it may be incorrect. There is an ongoing exploration of the methods used to arrive at this position.

Contextual Notes

Participants are grappling with the conversion of units and the application of spring mechanics, specifically how to calculate the extension caused by the mass. There is a lack of consensus on the correct approach to the problem.

bosox3790
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A spring with k = 47 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.7 kg mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?

I got the answer to be 141 cm because I thought that the 15cm is to be converted into meters, can anyone help me with this question?
 
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yes the cm should be converted to metres

what is the extension as a result of the mass being attached?
 
I got 141 cm but that's not correct. I can't figure out the correct answer.
 
bosox3790 said:
I got 141 cm but that's not correct. I can't figure out the correct answer.

how did u get that?
 
I used 0+mg(0.15m + change in y)=0+ .5k(change in y)^2
 

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