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?