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Homework Help: Flying circular mass problem

  1. Mar 17, 2013 #1
    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.

    Okay, so Y = stress/strain. For strain I need the force on the wire, and from there I can solve for the extension of the wire and use that to calculate how far the atoms move. But how do I get the force?
  2. jcsd
  3. Mar 17, 2013 #2

    Doc Al

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    Staff: Mentor

    Apply Newton's 2nd law to the mass. What's its acceleration?
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