Question

A body of mass 3kg and volume 4 * 0.0004 m is hung from a balance graduated in Newton’s what is the reading balance when the body is

Answer 1

In air

$W =mg \\W=3\times9.8=29.4N$ full immerge in water

$F=mg-\rho gV$

$$F=9.8\times3-10^3\times9.8\times4\times10^{-4}$$

$F=25.48N$