Interesting Posers

1. A rubber string of cross section A is pulled by a force P along the axis. Comment on the normal stresses developed.
2. Is there a situation of loading possible for which the stress tensor matrix will cease to be symmetric?
3. There is a string A'A and at A there is a mass m. From mass there is a string B'B and there is a mass m loaded at B. A force F to the mass m loaded at B. The task is to break the thread B'B. Is it possible? (A'A and B'B are strings with same properties)
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snipped-for-privacy@gmail.com wrote:

I don't recognize these exact questions.
What class uses these for homework?
Jim
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