When a Heavy Metal Block Is Supported by a Cylindrical $F / \sqrt { 2 }$

Multiple Choice

When a heavy metal block is supported by a cylindrical vertical post of radius R, it exerts a force F on the post. If the diameter of the post is increased to 2R , what force does the block now exert on the post?

A) F/2
B) $F / \sqrt { 2 }$
C) 2F
D) F/4
E) F