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Percentage Uncertanty and youngs modulus!

  • #1

Homework Statement



hi there! I am new to this forum and was just wondering if anyone could help with this question on percentage uncertainty. I am supposed to find the percentage uncertainty in d^3

the info given is
mass attached to the end of a strip= 0.1 (+-0.001)kg
the width of the strip = 12.6 (+- 0.1)mm
the thickness of the strip= 0.66(+- 0.01)mm

Homework Equations


I am also given the equation for youngs modulus

E= 16pi^2 K^2 M/bd^3

The Attempt at a Solution



I worked out the percentage uncertainty of the thickness of the strip which was approx. 1.52% but am for completely lost:confused:

Thank You!
 

Answers and Replies

  • #3
so would i just simply multiply the percentage uncertainty by 3 as its d^3?
 
  • #4
Mapes
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Sure, I'd buy that.
 

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