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Q: The moment of total area of a plane lamina about its centroidal axis is equal to ______.
  • A. zero
  • B. twice the area of plane lamina
  • C. area of plane lamina divided by its perimeter
  • D. area of plane lamina
Correct Answer: Option A - Moment of total area of plane area about its centroidal axis is always zero because centroid is the geometric center of any object and moment of area about that point will be zero as there will not be any perpendicular distance between the force and its point of action as both will pass through the centroid.
A. Moment of total area of plane area about its centroidal axis is always zero because centroid is the geometric center of any object and moment of area about that point will be zero as there will not be any perpendicular distance between the force and its point of action as both will pass through the centroid.

Explanations:

Moment of total area of plane area about its centroidal axis is always zero because centroid is the geometric center of any object and moment of area about that point will be zero as there will not be any perpendicular distance between the force and its point of action as both will pass through the centroid.