Question

Magnitude of buoyant force is given by

• A. Newton's first law
• B. Archimedes principle
• C. Newton's second law
• D. None of the above

Answer 1

Answer: (B)

Archimedes principle

Archimedes principle, states that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant force the magnitude of which is equal to the weight of the fluid displaced.

$F_B=V\rho g$

$F_B\to$buoyant force

$V\to$ displaced volume

$\rho \to$density of the liquid

$g\to$ acceleration due to gravity