Physics · MECHANICAL PROPERTIES OF SOLIDS

In structural engineering, pillars or columns used in buildings and bridges are often designed with distributed ends rather than rounded ends. According to the mechanical principles of loaded columns, this is because:

1. A
   Rounded ends increase the ultimate tensile strength of the pillar material
2. B
   Distributed ends eliminate the requirement of maintaining Young's modulus across the column
3. C
   A pillar with distributed ends supports a larger load without buckling than a pillar with rounded ends
4. D
   A pillar with rounded ends has a strictly zero Poisson's ratio