A cylindrical container of length L is full of a liquid which has mass density ρ. It is placed on a weigh-scale; the scale reading is W. A ball which would float on the liquid if allowed to do so, of volume V and mass m is pushed gently down and held beneath the surface of the liquid with a rigid rod of negligible volume as shown.
What is the reading of the scale when the ball is fully immersed?
A) W+ρVg
B) W
C) W+mg-ρVg
D) None of these