🌈 Mind map of Floatation
● A state in which a solid stay fully or partially immersed near the top of a liquid put in a container.
● Principle of Floatation: When a body is immersed in a liquid, the following two forces act on it-
- Weight of the body acting vertically downward
- The buoyant force of a liquid vertically upwards
● Conditions for Floatation:
1. Density of solid less than liquid
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2. Density of solid equal to Density of liquid.
● Law of Floatation: The weight of a floating body is equal to the weight of the liquid displaced by its submerged part.
● The apparent weight of a floating body is zero.
● More the density of liquid more is the portion of floating body outside the liquid
● Floatation of ice on water: A piece of ice floats on water with its
9/ 10 the inside the water and only it 1/10 the part of it outside the water.
The reason is that the density of ice is 0.9 g/ cm³ while the density of water
is 1 g/ cm³. Hence the weight of water displaced by 9/10 the part of ice
immersed inside water becomes equal to the total weight of the ice piece.
Here's a Video Representation:
