Question

A body weighs $W$ $gf$ in air and $W_1$ $gf$ when it is completely immersed in water. Find the buoyancy force.

• A. $(W-W_1)gf$
• B. $(W+W_1)gf$
• C. $Wgf$
• D. $W_{1}gf$

Answer 1

The correct option is A $(W-W_1)gf$

We know that as per Archimedes principle,
Buoyancy Force = Weight of Volume of water displaced = Weight of body in air - Weight of body when immersed in water.

$F=(W-W_1)gf$