Question

A sphere of iron and a block of wood having the same volume are held under water. Which of these will experience a greater buoyant force?

• A. Iron sphere
• B. Wooden block
• C. Both A and B
• D. Can’t be determined

Answer 1

The correct option is C Both A and B

Buoyant force = $v_s\rho g$ where $v_s$ is volume of solid, $\rho$ is density of water and $g$ is acceleration due to gravity. For both the cases, the density of water and volume of solid is same.

Both the iron sphere and the wooden block will experience the same force because the buoyant force depends upon the volume of the object and density of the liquid.