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benji123
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Homework Statement
Hi all! I am new to the forum, came across it from googling the problem which I had and someone was having difficuilty with a question like this on here! Here's the question I have...
The coefficient of rigidity, n, of a wire of length L and uniform diameter d is given by
n=AL/d^4
If A is a constant and the parameters L and d are known to within ± 2% of their correct values, estimate the maximum possible percentage error in the calculated value of n.
Homework Equations
n=AL/d^4
The Attempt at a Solution
dn = dn/dL x dL + dn/dA x dA
dn = A/d^4 dL + L/d^4 dA
n = A/d^4 x ΔL + L/d^4 x ΔA
n = ΔL/L + ΔA/A
Where do I go from here? Any help will be greatly appreciated :)