Question

Both are
. You are provided with a hollow iron ball A of mass
20
g
and a solid iron ball B of 20
g
placed on the surface of water. Which ball will
experience more upthrust? ​

Answer 1

Explanation:

hollow iron ball A mass = 20g

we know that upthrust force = F = density (water, metal, air) * gravity g * V (volume of water).

now

density of solid ball is greater than density of hollow solid ball.

let us assume hollow solid ball consists of air inside the hollow region.

air is less denser than iron and water.

upthrust will be more for hollow metal ball as compared to solid metal ball according above equation of upthrust force.