Applications of law of flotation
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Laws of Floatation
A body floats in a liquid if :
1. Density of the material of the body is less than or equal to the density of the liquid.
2. If density of material of body is equal to density of liquid, the body floats fully submerged in liquid in neutral equilibrium.
3. When body floats in neutral equilibrium, the weight of the body is equal to the weight of displaced liquid.
4. The centre of gravity of the body and centre of gravity of the displaced liquid should be in one vertical line.
Now, we will understand Centre of Buoyancy and Meta Centre
Centre of Buoyancy: The centre of gravity of the liquid displaced by a body is known as centre of buoyancy.
Meta centre: When a floating body is slightly tilted from equilibrium position, the centre of buoyancy shifts. The point at which the vertical line passing through the new position of centre of buoyancy meets with the initial line is called meta centre.
What are the conditions for stable equilibrium for floating body?
a. The meta centre must always be higher than the centre gravity of the body.
b. The line joining the centre of gravity of the body and centre of floatation should be vertical.
We know density is mass per unit volume. Its S.I unit is kg/m3 and relative density is density of material per density of water at four degree Celsius. Relative density is measured by Hydrometer.
- The density of sea water is more than that of normal water. That is why it is easier to swim in sea water.
- When ice floats in water, its 1/10th the part remain outside the water.
- If ice floating in water in a vessel melts, the level of water in the vessel does not change.
- Purity of milk is measured by lactometer.
From the article we have learnt that what is floatation, how can we swim, why some objects floats instead of sinking, what are the laws of floatation etc.
plz mark as brainlest and thanks me too
Laws of Floatation
A body floats in a liquid if :
1. Density of the material of the body is less than or equal to the density of the liquid.
2. If density of material of body is equal to density of liquid, the body floats fully submerged in liquid in neutral equilibrium.
3. When body floats in neutral equilibrium, the weight of the body is equal to the weight of displaced liquid.
4. The centre of gravity of the body and centre of gravity of the displaced liquid should be in one vertical line.
Now, we will understand Centre of Buoyancy and Meta Centre
Centre of Buoyancy: The centre of gravity of the liquid displaced by a body is known as centre of buoyancy.
Meta centre: When a floating body is slightly tilted from equilibrium position, the centre of buoyancy shifts. The point at which the vertical line passing through the new position of centre of buoyancy meets with the initial line is called meta centre.
What are the conditions for stable equilibrium for floating body?
a. The meta centre must always be higher than the centre gravity of the body.
b. The line joining the centre of gravity of the body and centre of floatation should be vertical.
We know density is mass per unit volume. Its S.I unit is kg/m3 and relative density is density of material per density of water at four degree Celsius. Relative density is measured by Hydrometer.
- The density of sea water is more than that of normal water. That is why it is easier to swim in sea water.
- When ice floats in water, its 1/10th the part remain outside the water.
- If ice floating in water in a vessel melts, the level of water in the vessel does not change.
- Purity of milk is measured by lactometer.
From the article we have learnt that what is floatation, how can we swim, why some objects floats instead of sinking, what are the laws of floatation etc.
plz mark as brainlest and thanks me too
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Answer:
The floating of ship on water; Ships generally are made of heavy metals which makes them denser than water but they float on water because they contain a whole lot of air which makes their avg. density less than that of water so they're able to float on water.
Hot air balloon; The air inside the balloon is heated by a burner to a temperature which makes it less dense than the air outside of the balloon. As a result the balloon floats
Icebergs; Iceberg float because when water freezes it expands and the solid is less dense than the liquid
Explanation:
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