Question

Which principle tells us about the decrease in weight of a body when immersed in a liquid?

Answer 1

Archimedes law:

1. According to Archimedes' principle, whenever a body is submerged in a liquid, some upward push is equivalent to the weight of the fluid dispersing.
2. As a consequence, whenever a solid has been submerged in a fluid, the weight reduction is equivalent to the weight of the liquid displaced.

3. The weight owing to gravity being fought by the fluid's propulsion, as seen in the figure. The weight of the object inside the liquid is the sole force acting on it. Since this liquid's upthrust reduces the real gravitational pull, the item seems to be lighter.

Mathematically, Archimedes's law can be represented as:

${\mathrm{F}}_{\mathrm{b}}=\mathrm{\rho }\times \mathrm{g}\times \mathrm{V}$

Here,

F_b is the buoyant force.

ρ is the density of the fluid.

V is the submerged volume.

g is the acceleration due to gravity.

Therefore, Archimedes’ law explains that a buoyant force acts on an object immersed in the fluid.