Question

calculate the density of a body which weighs 15 Newton in air and 12 Newton in water (density of water is equal to 1000kg/m³) If u don't know then it's better to stay quiet . Its an urgent

Answer 1

• Upthrust acting on the body in water = 15 − 12 = 3 N

• g = 10 m/s²

• Volume, V = $\bold{\frac{3}{10}}$ = 0.3 cm³

The body weighs 15 N in air,

$\implies\bold{15=mg}$

$\implies\bold{15=10m}$

$\implies\bold{m=\frac{15}{10}}$

${\implies\bold{m=1.5\:g}$

$\boxed{\bold{Density=\frac{Mass}{Volume}}}$

$\implies\bold{\rho=\frac{1.5}{0.3}}$

$\implies\bold{\rho=5\:g/cm^3}$

$\boxed{\bold{\therefore Density=5\:g/cm^3}}$