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kiri nanchuk Grade: 12
        

What is the gravaitaional field?

8 years ago

Answers : (1)

askIITIians Expert
21 Points
										

Gravitational Field


We say that a body A exerts a force of gravitation on another body B kept at a distance. This is called action at  a distance viewpoint. However, this viewpoint creates certain problems when one deals with objects separated by large distances. It is now assumed that a body can not directly interact with another body kept at a distance. The force between two objects is seen to be two-step process.


Int he first step, it is assumed that the body A creates a gravitational field in the space around it. The field has its own existence and has energy and momentum. his field has a definite direction at each point of the space and its intensity varies from point to point.


In the second step, it is assumed that when a body B is placed in a gravitational field, this field exerts a force on it. The direction and the intensity of the field is defined in temrs of the force it exerts on a body placed in it. We define the intensity of gravitational field E at a point by the equation.


E = F/m


where F is the force exerted by the field on a body of mass m placed in the field. Quiet often the intensity of gravitational field is abbreviated as gravitational field. Its SI unit is N/kg

8 years ago
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