Strength SVG – physical vector value, which is a measure of the influence of other bodies or fields on a given body. Application of force causes changes in body speed or appearance of deformations and mechanical stresses. Deformation can occur both in the body itself and in the objects that fix it, such as springs.
Influence is always carried out by means of fields created by the bodies and perceived by the body in question. Different interactions are reduced to four fundamental interactions; according to Standard Elementary Particle Physics, these fundamental interactions (weak, electromagnetic, strong and possibly gravitational) are realized through the exchange of calibration bosons.
Strength SVG is usually indicated by the F symbol – from lat. fortis (strong).
The most important physical law that includes force is Newton’s second law. It says that in inertial reference frames the acceleration of the material point in the direction of the applied force coincides with the applied force, and in module it is proportional to the force module and inversely proportional to the mass of the material point.
The word “force” in the Russian language is ambiguous and is often used (by itself or in combinations, in science and everyday situations) in meanings different from the physical definition of the term.
Strength SVG characteristics
The force is a vector value. It is characterized by the module, direction and point of application. It also uses the concept of force line, which means a line of force passing through the force application point, along which the force is directed.
The dependence of force on the distance between bodies can have a different form, but usually at large distances the force tends to zero – so the separation of the body from other bodies with good accuracy provides a situation of “lack of external forces”. Exceptions are possible in some cosmological problems concerning dark energy.
In addition to the division by type of fundamental interactions, there are other classifications of forces, including: external-internal (i.e., acting on material points (bodies) of a given mechanical system from the side of material points (bodies) not belonging to this system and the forces of interaction between material points (bodies) of the system), potential and not (whether the field of forces under study is potentially), elastic-dissipative, concentrated-distributed (applied in one or many points), constants or variables in time.
At transition from one inertial system of readout to another transformation of forces is carried out as well as fields of the corresponding nature (for example, electromagnetic, if force electromagnetic). In the limit of low velocities it is possible to consider force as an invariant.
The system of forces is a set of forces acting on the body in question or on the points of the mechanical system. Two systems of forces are called equivalent if their action separately on the same solid body or material point is the same under other equal conditions.
A balanced system of forces (or a system of forces equivalent to zero) is a system of forces, the effect of which on a solid body or a material point does not lead to a change in its kinematic state.