Advertisements
Advertisements
प्रश्न
A ball weighing 4 kg of density 4000 kg m–3 is completely immersed in water of density 103 kg m–3 Find the force of buoyancy on it. (Given g = 10 m s–2)
Advertisements
उत्तर
Here, Mass of the ball, m = 4 kg Density of ball, ρ = 4000 kg m–3 Density of water σ = 103 kg m–3
∴ Volume of ball = `"m"/"ρ" = (4"kg")/(4000 "kg m" ^-3)`
= 10–3 m3
So force to buoyney on the ball
= V σ g = 10–3 × 103 × 10
= 10 N
APPEARS IN
संबंधित प्रश्न
The density of gold is 19 g/cm3. Find the volume of 95 g of gold.
What is the mass of 5 m3 of cement of density 3000 kg/m3 ?
What is the difference between the density and relative density of a substance ?
If the relative density of a substance is 7.1, what will be its density in SI units ?
5 kg of material A occupy 20 cm3 whereas 20 kg of materia! B occupy 90 cm3. Which has the greater density : A or B ? Support your answer with calculations.
The density of turpentine is 840 kg/m3. What will be its relative density ? (Density of water = 1000 kg/m3)
A body floats in kerosene of density 0.8 x 103 kg/m3 up to a certain mark. If the same body is placed in water of density 1.0 x 103 kg/m3, will it sink more or less ? Give reason for your answer.
When a golf ball is lowered into a measuring cylinder containing water, the water level rises by 30 cm3 when the ball is completely submerged. If the mass of ball in air is 33 g, find its density.
An object is put in three liquids having different densities, one by one. The object floats with `1/9` , `2/11` and `3/7` parts of its volume outside the surface of liquids of densities d1, d2 and d3 respectively. Which of the following is the correct order of the densities of the three liquids?
A cube of side 5 cm is immersed in water and then in a saturated salt solution. In which case will it experience a greater buoyant force. If each side of the cube is reduced to 4 cm and then immersed in water, what will be the effect on the buoyant force experienced by the cube as compared to the first case for water. Give a reason for each case.
