Force Fields, It’s Concept

In physics, force fields  are vector fields that describes the non-contact forces acting on particles at different positions in space.

CONTENT

CONCEPT OF FIELDS

TYPES OF FIELDS

PROPERTIES OF FORCE FIELD

ACCELERATION DUE TO GRAVITY

 

CONCEPT OF FORCE FIELDS

A force field is a map of the forces felt in a specific area of space. To better explain this, we should first describe a field. Although this sounds mysterious,in physics, the field is actually just a specific number of maps on the space area. For example, if you walk around an actual farmer’s field and measure the temperature,and then write these measurements on the map, only one temperature field is plotted.{\displaystyle {\vec {x}}}

TYPES OF FIELDS

ELECTRIC

Electric field, the electrical property associated with each point in space when a charge exists in any form. The strength of the electric field E at any point can be defined as the electric field applied per unit or coulomb force F. Each point of the electric field in space is defined as the force (per unit charge) that the vanishing small positive charge will experience if it remains at that point. Since the electric field is defined by force, and the force is a vector(that is, it has both magnitude and direction),it can be seen that the electric field is a vector field. [8]:469-70 This form of vector field is sometimes called a force field. The electric field acts between the two charges, similar to the way the gravitational field acts between the two masses, because they all obey the inverse square law of distance.

GRAVITATIONAL

In physics, the gravitational field is a model used to explain the effect of a large mass extending into the space around itself, on the force of another large mass. Therefore, the gravitational field is used to explain gravitational phenomena and is measured in Newton per kilogram (N/kg). In its original concept, gravity is the force between the point masses. Newton’s law of universal gravitation states that the  mass M of the two points between F and m are separated by a distance r and join their central role along the line, which is proportional to the mass and inversely proportional to the gravitational field, which refers to the gravitational force per unit mass applied to a small mass at that point. It is a vector field pointing in the direction of the force that the mass will feel. The si unit system, the proportional constant is g the gravitational constant, the value of which is 6.67×1011Nm2kg2

MAGNETIC

The magnetic force, attraction or repulsion generated between charged particles due to their movement. It is the basic force responsible for this effect, such as the role of the motor and the attraction of the magnet to the iron. There is electric force in the stationary charge;there is electric force and magnetic force in the moving charge. The magnetic force between the two moving charges can be described as the effect of the magnetic field generated by the other charge on either charge. The magnetic force applied to the moving charge is applied in a direction at right angles to the plane formed by the direction of its velocity and the direction of the surrounding magnetic field.

PROPERTIES OF A FORCE FIELD

The nature of the gravitational field

(a) The force line points to the center of the planet; therefore, it is a radial field.

(b) The gravitational field (field strength)’g’at a certain point is the force per unit mass placed at that point. That is, g=Fm, the unit is N/kg, but S. I unit is m/s2

(c) Any force acting on an object falling towards the center of the earth is given by F=mg (d) The gravitational field is a vector quantity.

The nature of the magnetic field

(a) Direction: When the magnet is suspended freely, it rests in the north-south direction of the Earth.

(b) Attractiveness: Magnets have the ability to attract magnetic materials, such as steel, iron, etc.

(c) Force: Magnets apply force to other magnets in a manner similar to magnetic pole rejection and different magnetic pole attraction.

(d) The inseparable nature of the magnetic pole on the magnetic dipole: if the magnet is broken into small pieces, no matter how small it is, it will still have an arctic and antarctic pole. The smallest bit of the magnet is the dipole.

(e) The magnetic field line originates at the North Pole and terminates at the South Pole.

The nature of the electric field

(a) The power line originates from the positive charge and terminates from the negative charge.

(b) Power lines never cross each other.

(c) The way they repel each other.

(c) They are in a state of tension and tend to shorten them.

(d) The electric field at a certain point is defined as the force per unit charge placed at that point. That is, ε=Fq is measured in Newton per coulomb N/C

 

ACCELERATION DUE TO GRAVITY

The acceleration of any object moving under the sole influence of gravity. In fact, this amount, known as the acceleration of gravity, is such an important quantity that physicists have a special symbol to represent it-the symbol G. The value of the acceleration of gravity is most accurately called 9.8 m/s/s. In physics, the acceleration of gravity is the acceleration at which an object falls freely in a vacuum (and therefore does not encounter resistance).

This is a stable gain in speed caused entirely by gravity. At a fixed point on the surface of the Earth, all bodies accelerate in a vacuum at the same speed, regardless of the mass or composition of the body.

The measurement and analysis of these speeds is called gravimetric method. At different points on the earth’s surface, free fall acceleration ranges from 9.764 m / s2 to 9.834 m/s Depends on altitude, latitude and longitude. The conventional standard value is defined as 9.80665 m/s2 (about 32.17405 ft/s2).

A position that changes significantly from this value is called a gravity anomaly.

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