How could one determine experimentally the centroid of an irregular body?

Answer 1

To experimentally determine the centroid of an irregular body, one can use the balancing method. Suspend the object from a point and let it hang freely; the vertical line passing through this point will indicate the direction of gravity. Mark this line on the object, then repeat the process from another point. The intersection of the two lines will give the location of the centroid. Alternatively, one can use water displacement to find the center of mass by submerging the object in water and calculating the volume of water displaced.