Question

The apparent weight of wood floating on water if it weighs $100g$ in air is:

• A. $400g$
• B. $300g$
• C. $100g$
• D. Zero

Answer 1

The correct option is D Zero

We know that wood floats on water.

Let the volume of wood immersed in water be $V^{\ast }$

Then, buoyant force is $B=\rho g{V}^{\ast }$

But, as wood is floating and in equilibrium, $B=W$

Apparent weight $W^{\prime }=W-B=0$