Equation help

Discussion in 'Physics' started by Robin Mitchell, Dec 8, 2010.

1. Robin Mitchell Thread Starter Well-Known Member

Oct 25, 2009
803
252
Hi everyone

Just did a pratical exam and i want to know where this equation comes from:

There is an oscillating metal strip with a mass attatched to the end.

youngs modulus = (16 PI ^2 * M K^2) / (b * d^3)
lg f = lg K + n lg L
F is the frequency in hz
L is the length of the strip in m
n is the gradient (i got about -0.98)
lg K is the intercept and its a length of some sort
M is the mass (i got 100g)
b is the width of the strip
d is the thickness of the strip

Also, this equation implies that younges modulus can vary with the mass on the end!

Thanks

Oct 25, 2009
803
252

Feb 5, 2010
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4. BillO Distinguished Member

Nov 24, 2008
993
137
I always loved questions that begin such: "Can you define in your own words..."

I was always tempted to reply with "Yes. However, do you think you could understand it?"

I'm glad to see my old alma mater is still asking simple questions the wrong way.