Buoyancy or Up thrust
Buoyancy or Up thrust
BUOYANCY OR UP THRUST:
The tendency of a liquid to exert an upward force on an object immersed in it is called buoyancy. Gases also exhibit this property of buoyancy.
Buoyant force is an upward force which acts on an object when it is immersed in a liquid. It is also called upthrust.
It is the buoyant force due to which heavy object seems to be lighter in water. As we lower the position of an object into a liquid, the greater upward pressure of liquid underneath it, provides an upward force.
e.g. A piece of cork is held below the surface of water. When we apply a force by our thumb, the cork immediately rises to the surface. This is due to the fact that every liquid exerts an upward force on the objects immersed in it.
Note :
The volume of a solid of mass 500 gms is 350 cm3. What will be the mass of water displaced by this solid? | |||
| Right Option : B | |||
| View Explanation |
A metal coin sinks wheras a ship floats . This is due to ______________ . | |||
| Right Option : B | |||
| View Explanation | |||
A ball of uniform density 2/3 of that of water is dropped freely into a pond from a height 10 m above its surface, the maximum depth the ball can travel in water is | |||
| Right Option : C | |||
| View Explanation |
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