Gravitational Field Lines
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Qualitatively describe the differences between the fields and the entities responsible for the field lines.
What is a gravitational field the gravitational field is the force field in gravitational interaction which is a model used to explain and understand gravitational phenomena.
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Gravitational field lines. A magnetic field has no sources or sinks gausss law for magnetism so its field lines have no start or end. Therefore g is larger when lines are close together and smaller when they are far apart. A useful means of visually representing the vector nature of an electric field is through the use of electric field lines of force. Magnitude of gravitational field is proportional to the number of field lines per unit area through a surface perpendicular to the lines.
In its original concept gravity was a force between point masses. So to visualize the gravitational field in this room or on a bigger scale such as the whole solar system imagine drawing a vector representing the gravitational force on a one kilogram mass at many different points in. They can only form closed loops extend to infinity in both directions or. A gravitational field has no sources it has sinks at masses and it has neither elsewhere gravitational field lines come from infinity and end at masses.
As youve already seen you pull on the earth with exactly the same force as it pulls on you. Gravitational field strength g. Thus a gravitational field is used to explain gravitational phenomena and is measured in newtons per kilogram nkg. However your gravitational field is intrinsically much much weaker than that of the earth.
A pattern of several lines are drawn that extend between infinity and the source charge or from a source charge to a second nearby charge. The gravitational field at any point p in space is defined as the gravitational force felt by a tiny unit mass placed at p. Gravitational field lines are always pointing towards the center of mass. In physics a gravitational field is a model used to explain the influence that a massive body extends into the space around itself producing a force on another massive body.
The concepts of field and field lines will be used again when we look at electric fields and magnetic fields. The less concentrated the field lines the smaller the force. Its direction is towards the object that causes the field. Always use the given value for g.
In a field line diagram the direction of the field line at a point gives the direction of the force of attraction that would be felt by a small mass placed there. The gravitational field due to a body is thus also infinite we cannot see or touch this field but we can try to model it using field lines or lines of force. The pattern of lines sometimes referred to as electric field lines point in the direction that a positive test charge would. Gravitational field lines black and equipotentials around the earth.