Simply cannot get my calculator to give me the correct answer?

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Homework Help Overview

The discussion revolves around a calculation involving the damping ratio, specifically the formula for calculating it based on given parameters. The original poster is attempting to reconcile their calculator's output with a previously established answer from a tutorial.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster describes their attempts to calculate the damping ratio using the provided formula and expresses confusion over discrepancies in results. Participants question the accuracy of the equation as written, particularly the presence of E2 in both the numerator and denominator.

Discussion Status

Participants are actively engaging in clarifying the equation and exploring potential errors in transcription. There is a focus on ensuring the correct formulation of the equation before proceeding with calculations.

Contextual Notes

There is uncertainty regarding the correct transcription of the damping ratio formula, which may impact the calculations being performed. The original poster's confusion stems from differing results compared to a tutorial example.

Jowin86
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Simply cannot get my calculator to give me the correct answer!?

Homework Statement



I'm going through a worked example I did in a tutorial and cannot get the same answer we did in class with my calc!?


Homework Equations



Damping ratio = the square root of E2 / 4∏2 n2 E2

Where E=2.526 n=2

The Attempt at a Solution



I'm getting 0.0796 , doing 4x(pie2) and 0.0398 doing (4xpie)2

The answer from tutorial is 0.1971 and is deffinately correct.

I've broken each bit down and worked it out separately and put it into the calc then in the simplified way but still I'm not getting the right answer :(
 
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Jowin86 said:
Damping ratio = the square root of E2 / 4∏2 n2 E2
Can you retype that equation, using parentheses as needed. It looks like you have E2 twice.
 


Yeah that what I've got written down in my notes. Maybe I copied it down wrong?
 


Jowin86 said:
Yeah that what I've got written down in my notes. Maybe I copied it down wrong?
You must have. You have an E2 in numerator and denominator, which would cancel out. (I doubt that's what was meant.)
 

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