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State Newton’s Law of Gravitation.
Newton’s Law of Gravitation : This law states that everybody in the universe attracts each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The force of attraction acts along the line joining the centres of the two bodies.…
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What is Gravitational Constant (G)?
Gravitational Constant (G): If and are the two masses of two bodies respectively separated by a distance r, the force of attraction F along the line joining the centres of the two bodies is Where G is the constant of proportionality and is called the Gravitational Constant. If and then . Therefore the gravitational constant…
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Mention Characteristics of Gravitational Force.
Characteristics of gravitational force : Since the gravitational force act along the line joining the particles, it is a central force and so gravitational field is conservative. Gravitational force is only attractive force, it is not a repulsive force and it varies as the inverse square of the distance between the two particles. The value…
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Discuss Universality Of The Law Of Gravitation.
The universality of the law of gravitation Newton’s law of gravitation is equally valid for anybody whether it is small or large. This law does not depend on the states of the two bodies (solid, liquid, or gas), their chemical composition, their temperature, the intermediating medium. This law is valid in case of a small…
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What Is Gravitational Field?
Gravitational Field: The region of space around a body within which its gravitational force of attraction can be experienced is called the gravitational field. Mathematically it is extended to infinity. Practically its effect is limited to some extend.
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What Do You Mean By Gravitational Intensity?
Gravitational Intensity: Gravitational intensity at a point in a gravitational field is defined as the attractive force experienced by a unit mass placed at that point. The gravitational intensity at a point which is at a distance from a mass is , where is the gravitational constant. The dimension of intensity is
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What Do You Mean By Gravitational Potential?
Gravitational potential: The amount of work done in bringing a unit mass from infinity to any point in the gravitational field is called the gravitational potential at that point. Gravitational potential due to a point mass: Let the gravitational field is created due to a particle of mass at point O. Let us calculate the…
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Relation Between Gravitational Intensity And Gravitational Potential.
Let us consider two points A and B lying very near to each other at a distance in a gravitational field acting in the direction from B to A as shown in the adjoining fig. Let the potential at A is and at B is . The work done in moving a unit mass from…
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The Gravitational Potential Due To A Thin Uniform Spherical Shell At A Point (i)Outside, (ii)At The Surface, (iii) Inside The Shell.
Gravitational Potential Due To A Thin Uniform Spherical Shell: Let us consider a thin spherical uniform shell of radius , surface density . Let is a point at a distance from the centre of the shell. To find the potential at the point , let us divide the shell into a large number of thin…
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Intensity Of Gravitational Field Due To A Thin Spherical Shell At A Point (i) Outside The Shell, (ii) On Surface Of The Shell, (iii) Inside The Shell.
(i)At a point outside the shell: Gravitational potential at a point outside rthe thin uniform spherical shell, at a distance , is given by, . Where is the gravitational constant, is the mass of the shell, is the radius of the shell, is the distance from the centre of the shell. The Gravitational Potential Due…
