Question

An object weighing 10N in the air, weighs 8N in liquid A and 9N in liquid B. In which liquid the buoyant force experienced by the body is more and why?

Answer 1

Weight in a liquid = Actual weight - buoyant force

For Liquid A,
8 = 10 - Buoyant force(A)
Buoyant force(A) = 2 N

For Liquid B,
9 = 10 - Buoyant force(B)
Buoyant force(B) = 1 N

We can clearly observe that the buoyant force exerted by liquid A is more.

Answer 2

weight of water displaced by the object in liquid A = 10 - 8 = 2 N
and
weight of liquid displaced in liquid B = 10 - 9 = 1 N
and
we know weight of water displaced = volume of the object and ,
volume of the water displaced = upthrust force
so,
2 N>1 N
therefore
when the object was in liquid A it has experienced more upthrust force

i hope it helps.........