A wire of diameter 0.8 mm carries a load of 50 N. The stress in the wire is:

  1. 3.98 10^8 Pa
  2. 9.95 10^7 Pa
  3. 2.49 10^7 Pa
  4. 1.99 10^8 Pa
Answer

B) 9.95 10^7 Pa

A = pi r^2 = pi(4 10^-4)^2 = 5.03 10^-7 m^2; sigma = F/A = 9.95 10^7 Pa. SLO P-11-B-24 · Application

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