A Nail Projects 25

Multiple Choice

A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail, and the nail deflects downward by 2.00 × 10^-5 m. If the shear modulus is 3.40 × 10¹⁰ N/m², then what is the radius of the nail?

A) 1.60 mm
B) 1.86 mm
C) 2.16 mm
D) 2.44 mm
E) 2.65 mm