# Archimedes Principle & Buoyancy force (Basic Concept of Fluid Mechanics Part-2)

### When body floats?

#### According to archimedes principle,body will float if weight of the body is equal to the buoyant force.

In above image cylinder is floating that means

## Stability of submerged body

##### 1. Stable equilibrium

When the center of buoyancy lies above the center of gravity, submerged body is in stable equilibrium.

##### 2. Unstable equilibrium

When the center of buoyancy lies below the center of gravity, submerged body is in unstable equilibrium.

##### 3. Neutral equilibrium

When both centers of buoyancy lie & center of gravity lie at the same point, submerged body is in neutral equilibrium.

## Stability of floating body

##### 1. Stable equilibrium

When a body is given a small angular displacement by external means and if the body comes to its original position due to internal forces then it is in stable equilibrium.

##### 2. Unstable equilibrium

When a body is given a small angular displacement by external means and if the body does not comes to its original position due to internal forces then it is in unstable equilibrium.

##### 3. Neutral equilibrium

When a body is given a small angular displacement and it set on new position instead of oscillation then it is in neutral equilibrium.

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