A Solid Wooden Sphere of Volume 0

Multiple Choice

A solid wooden sphere of volume 0.0100 m³ floats freely exactly one-half submerged in a liquid of density 800 kg/m³.A lightweight cord is now tied to the sphere and is used to pull the sphere under the surface and hold it completely submerged.What is the tension in the cord?

A) zero
B) 2.00 N
C) 39.2 N
D) 4.00 N
E) 78.4 N