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Topic	Date	User
rope jump	1-May-2007 At 10:17:58 AM	TonyB
Message
> ..all >your assumptions about stretch and load that a rope can take are based >on assumptions that the forces will get distributed evenly throughout the >rope. Ignoring the weight of the rope and transient wave effects, the force IS the same throughout the rope. What may vary is stress (force/unit area), if the cross sectional area varies at a point; and strain (deformation), if the Young's modulus varies due to weakness at a particular point. There is no "concentration of energy at one point". If there is sufficient necking or a sufficiently weak spot in the rope, the rope will break if the yield stress is exceeded. This is no different to a very short fall with a similar fall factor.

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