Question

An object of mass 40g has a volume of 80cm will it float or sink in water?

Answer 1

Density of water–»1gm/cm^3

Condition for floatation-

$\boxed{\red{Density\:of\:object≤Density\:of\:fluid}}$

$density \: of \: block \: is \\ \frac{40}{80} = 0.5$
since,
density of block < density of water

That's why block will float.

Answer 2

Mass of substance(m) =40g
Volume of substance (v) =80cm
Density of substance (d) =m/v=40g/80cm
=0.5gcm
The substance will not sink in water, as it Dencity is (0.5)is less than the density of water (1gcm).

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