- Equilibrium classes
- Stable equilibrium
- Unstable balance
- Indifferent balance
- Rotational balance factors
- Moment of force
- Torque
- Gravity center
- Static equilibrium
- Cartoon vector
- References
The rotational balance is one that is generated when a body is having a rotation or twist. This phenomenon occurs when the torques exerted by the forces acting on the body are zero.
That is, when the sum of all torques equals zero. These types of balances occur when the body does not undergo any variation during the rotational movement exerted on it.
The elements of rotation taken into account when expressing said phenomenon in mathematics are the force, represented by an "F", the arm, represented by a "b" and the axis on which the rotation occurs.
Equilibrium classes
Like all phenomena, there are various ways in which it can be produced, and different characteristics that will allow us to analyze certain types of processes. In the case of rotational equilibrium, there are three classes of equilibrium to define it.
Stable equilibrium
The balance of a body is stable when the body is suspended and its center of gravity is below its point of suspension.
On the other hand, when the body is supported, the stability of the balance will be noticed when the vertical through the center of gravity is within the suspension base.
Unstable balance
The balance of a body is stable when the body is suspended and its center of gravity is above its suspension point.
In the same way, when the body is supported, the stability of the balance will be noticed when the vertical through the center of gravity passes through the limit of the suspension base.
Indifferent balance
The balance of a body is stable when the body is suspended and its center of gravity coincides with both suspension points.
On the other hand, when the body is supported, the stability of the balance will be noticed when the vertical that crosses the center of gravity always passes through the suspension base.
Rotational balance factors
In order for a rotational equilibrium to occur, the existence of certain factors is necessary:
Moment of force
The moment of force is a magnitude that is reached thanks to the vector product of the position vector where the force is applied by the force vector. This factor is also known as Torque, by its English name torque.
Torque
The pair of forces is a system created with two parallel forces that have the same intensity, but that are in opposite directions. When applying this force a rotational movement is generated.
Gravity center
The center of gravity is considered the point of application of the union of all the forces of gravity that act on a body.
This center of gravity does not necessarily correspond to a material point and it can be said that it is the point where the forces exerted by gravity are zero.
Static equilibrium
Static equilibrium is one that occurs when all the forces acting on a body are balanced. This means that it is the one that occurs when a body is totally still and stable.
Cartoon vector
Vectors are a magnitude that is divided into module and direction.
References
- Equilibrium: Translational & Rotational. Retrieved on December 16, 2017, from Study: study.com
- Rotational Equilibrium. Retrieved on December 16, 2017, from Physics Lab Online: dev.physicslab.org
- Rotational Equilibrium. Retrieved on December 16, 2017, from Mini Physics: miniphysics.com
- Rotational Equilibrium. Retrieved on December 16, 2017, from SMU Physics: physics.smu.edu
- Torque and Rotational Equilibrium. Retrieved on December 16, 2017, from Spiff: spiff.rit.edu.