Q. An object of weight $w$ and density $\rho$ is submerged in a fluid of density $\rho_{1}$. Its apparent weight will be
A) $w(\rho - \rho_{1})$
B) $(\rho - \rho_{1})/w$
C) $w\ \left( 1 - \frac{\rho_{1}}{\rho} \right)$
D) $w(\rho_{1} - \rho)$
Explanation
(c) Apparent weight = true weight $–$ upward thrust
$= w - \left( \frac{w}{\rho} \right)\rho_{1} = w\left( 1 - \frac{\rho_{1}}{\rho} \right)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.