Buoyancy
What Causes Buoyancy?
When an object is immersed in water, pressure is exerted on the object, known as buoyancy. The force acting upwards is called buoyant force.
What are the Three Types of Buoyancy?
There are three types of buoyancy:
- Positive buoyancy: When the weight of an object is lighter than the fluid it displaces is called positive buoyancy.
- Negative buoyancy: When the weight of an object is greater than the fluid it displaces is called positive buoyancy.
- Natural buoyancy: When the weight of an object is equal to the fluid it displaces.
Why Buoyant Force Play an Important Role in Swimming?
When a swimmer is inside the water body, it is important that he/she stays on near the surface for safety, this is possible due to buoyant force which is a little more than the pressure exerted from above.
What is the Difference Between Buoyancy and Buoyant Force?
The difference between buoyancy and buoyant force is that buoyant force is the net force exerted upward on an object partially or completely submerged in water. Whereas, buoyancy is the phenomenon caused by the buoyant force. It is the tendency of an object submerged in water.
What is the Buoyant Force Equation?
The equation for the buoyant force is defined by Archimedes’ principle. It is given as:
Fb = -ρgV
How are Density and Buoyancy Related?
Buoyant force and buoyancy are directly proportional to the density of the liquid, more the density of the liquid, more will be the buoyant force.
Buoyant Force
Buoyancy is a phenomenon due to the buoyant force that causes an object to float. When you put an object in a liquid, an upward force is exerted on the object by the liquid. This force is equal to the weight of the liquid that has been displaced. The amount of liquid that has been displaced depends upon the density and the volume of the object immersed in the liquid. Have you ever wondered why an iron nail sinks in water, but a ship made up of iron floats? And why does an iron ball sink but a plastic ball of the same size floats in water? These wonders happen due to the phenomenon known as Buoyancy. Let’s learn the buoyancy definition, buoyancy equation, and its examples in detail.
Table of Content
- What is Buoyant Force?
- What causes Buoyant Force?
- Archimedes’ Principle
- Formula for Archimedes’ Principle
- Derivation of the Formula
- Demonstration of Buoyant Force
- Why does an Object float or sink in the water?
- Types of Buoyancy
- Applications of Buoyancy
- Solved Examples on Buoyancy