How far do atoms move in a wire when whirling it horizontally? [closed]

so the question is:

I whirl a mass m attached to a wire with length L and diameter d around my head in the horizontal plane. The mass takes t seconds to move around a circle. How far do the atoms in the wire move apart, compared to their spacing at rest? Young's modulus is given as Y.

I know the value of Young's Modulus(Y).

So: Y = Stress/Strain

For me to find the Strain I need to find the Stress first, which requires force(F) Stress = Force/A , A = cross-sectional area = pi*(d/2)^2

=> Y = (F/A)/strain = (F/(pi*(d/2)^2))/strain

So, to find the strain, I need to find the Force and from the answer I can find how far the atoms move.

My question is how to I go about to find the force?

Thanks

closed as off-topic by tpg2114♦, Brandon Enright, Kyle Kanos, John Rennie, ACuriousMind♦Sep 2 '14 at 13:44

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Homework-like questions should ask about a specific physics concept and show some effort to work through the problem. We want our questions to be useful to the broader community, and to future users. See our meta site for more guidance on how to edit your question to make it better" – tpg2114, Brandon Enright, Kyle Kanos, John Rennie, ACuriousMind
If this question can be reworded to fit the rules in the help center, please edit the question.

• Please try to use math formatting for better readability. – ja72 Aug 1 '14 at 19:10
• The force you are looking for is the cetripetal force. It is the force your wire needs to excert on the mass in order to keep it on its circular path. – Neuneck Sep 2 '14 at 10:05

What you're looking for here is the equilibrium case when the wire has stretched out and has a constant length as you're swinging it. When the wire has a constant length each little piece of it with mass $m$ is executing circular motion with a radius $r$, and the force required to keep that piece of the wire moving in a circle is simply the centripetal force $mv^2/r$ or $m \omega^2 r$.