The unit of stress in S.I. units is


A. N/mm2
B. kN/mm2
C. N/m2
D. any one of these

• N/m2.
  This means stress is newtons per square meter, or N/m2. However, stress has its own SI unit, called the pascal. 1 pascal (symbol Pa) is equal to 1 N/m2. In Imperial units, stress is measured in pound-force per square inch, which is often shortened to "psi".
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