Question

The mass of a block made of certain material is 1.35 kg and its volume is 1.5 x 10^-3 m³.

1. Find the density of block.
2. Will this block float or sink? Give reasons for your answer.

Answer 1

Mass of block = m = 1.35 kg

Volume of block = V = 1.5 x 10^-3 m³ 

(1) Density of block = `"m"/"V" = 1.35/(1.5 xx 10^-3) = 900` kgm^-3 

(2) Density of block (900 kgm^-3) is less than density of water (1000 kgm^-3)

∴ Block will float in water