External force of binding force

1. It's external force

binding force is to control the degree of freedom of an object, which belongs to external force.

2. It depends on the context of the topic.

4. Hello, I'm glad to answer for you. I hope I can help you
it depends on what you choose as your research object. If you choose a single link, the binding force of the hinge is the external force. If you choose a connecting rod, the direct hinge force of the connecting rod is the internal force
ast structure software team

5. The work done by conservative internal force is the change of potential energy, only external force, conservative internal force and non conservative internal force
we have defined 0 potential energy as the earth's surface, and defined gravity as conservative force. Therefore, we have the conclusion that the work done by gravity can increase potential energy. (it implies that gravity is the internal force of the system).
first of all, we need to know what force the internal force belongs to, Because the internal force is proced when the objects contact each other (under a kind of environment), it can be explained by non relativistic Newtonian mechanics Relativity refers to the energy conversion of objects in different environments (coordinate systems), while Newtonian mechanics refers to the energy change of objects in one environment (coordinate system)< After that, we should know the principle of force:
I. force in the environment is the effect of an object on an object, and force cannot exist alone without the object. There may also be a force between two objects that are not in direct contact
force is the external cause of acceleration or deformation
Newton's second law of non relativistic mechanics can be written as: F = ma< 2. The action of force on the object has the action of external force on some scattered points or areas of some surfaces
in the interior of an object, there are reactions generated by external forces or internal binding forces e to the deformation of the object. These internal deformation constraints are generated in pairs, together they offset each other and do not affect the acceleration
it has the function of distributing force in the internal parts. These forces are generally proportional to the mass of each part. For example, the force proced by weight and the inertial force caused by acceleration are all forces distributed in the body, which are generally called physical force, or physical force for short< 3. The distinction of forces on an object:
1. If the external forces on the object converge, the resultant force must be equal to the physical strength and in the opposite direction
2. If the resultant force passes through the center of mass of the object, the resultant force must be equal to the total mass multiplied by the acceleration of the object. The size and the direction of the action line are the same as the original resultant force, except that the action line shifts to the position passing through the mass center of the object, causing the acceleration motion of the mass center of the object
3. The resultant force of these converging external forces does not pass through the center of mass of the object. The resultant force can be transformed into the sum of a force acting on the center of mass and a couple moment around the center of mass. The moment of couple is equal to the vertical distance from the resultant force multiplied by the center of mass to the original line of action of the resultant force, which causes the angular acceleration of the object to rotate around the center of mass
knowing these, we can know that the energy change of internal force in non relativistic Newtonian mechanics can also be explained by relativistic energy conversion
we know that:
conservative force is the force that does work related to the path, also known as dissipative force, which is opposite to conservative force. For example, when friction does work, it will generate heat when it goes through each journey. When it returns from point a to point B, the work is not zero. When gravity returns from point a to point B, the work is zero. In this case, friction is non conservative force, and gravity is conservative force
then the non conservative internal forces can be distinguished by energy
there are many of these forces, which can be found by subtracting the released energy from the energy used in mechanical work A lot, I can't finish, only define.)

6. The definition premise of internal force and external force is "system"
if the applied object is an external object, then the force is an external force; On the contrary, it is internal force

7.

Binding force: legal binding force, self binding force

constraint reaction force: flexible body constraint, smooth contact surface constraint, smooth hinge constraint, bearing constraint

constraint force acting on non free particle system is called binding force. The direction of binding force is always opposite to the direction of movement hindered by the restraint. Common types of binding force are shown in Table 1. The size of the binding force is unknown, which depends on the motion state of the non free mass system and other forces acting on the non free mass system, and should be determined by the laws of Mechanics (such as differential equations of motion)

constraint counterforce is a kind of force, which hinders the movement of the constrained object

extended data:

differences between binding force and binding reaction:

binding force and binding reaction actually refer to the same force, but binding reaction also points out "reaction". This reaction shows the passivity of the force of the constraint on the object. It is the reaction force proced by the contact of the object with the constraint e to the obstruction caused by the motion of the object. If there is no active force, the object will not have a movement trend, and it will not be constrained to its reaction, that is, the constraint reaction

It can be said that binding force is the abbreviation of binding reaction

8.

1. The internal force and external force are relative to the system: if the applied object and the stressed object are internal objects of the system, such force is internal force, otherwise it is external force. That is to say, whether it is internal force depends on your definition of the system

The conservative force is that when an object is always under the action of a certain force, no matter it moves along any trajectory and finally returns to its original position, if the total work done by the force is 0, then the force is a conservative force. That is to say, the work done by the conservative force on the object is only related to the displacement of the object (pay attention to the concept of displacement), but has nothing to do with the path of displacement. It is conservative force that meets the condition, otherwise it is non conservative force

extended data :

conservative force judgment method:

1. For one-dimensional motion, all forces of position x single valued function are conservative forces. For example, the elastic force F = f (x) = - K (x-x0) obeying Hooke's law is a single valued function of X, so it is a conservative force

For more than one-dimensional motion, the force whose magnitude and direction are independent of position, such as gravity g = mg, is conservative

3. If there is a center O in space, the force F on the object (particle) P at any position is the same as the direction of "vector OP" (repulsive force) or the opposite (attractive force), and its magnitude is a single valued function of the distance r = scalar OP, then this force is called "central force". For example, gravitation is central force, and all central forces are conservative forces

9. The so-called restraint means that it will be enforced. For example, if you jump off a cliff, you die. This is the constraint of natural forces. In short, the legal binding force is guaranteed by the national coercive force. For example, if the debtor does not pay back the money, the state can enforce the debtor to pay back the money.