1 / 7

Gravitational Fields

Gravitational Fields. Gravitational Field Strength. Defined as the force per unit mass acting on a mass placed at that point. Gravitational field strength is a vector quantity. The units of gravitational field strength are Nkg -1. Gravitational Field.

esben
Download Presentation

Gravitational Fields

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gravitational Fields

  2. Gravitational Field Strength Defined as the force per unit mass acting on a mass placed at that point. Gravitational field strength is a vector quantity. The units of gravitational field strength are Nkg-1

  3. Gravitational Field A region in 3D space where a force is experienced by a mass in that field. The force is always an attractive force, unlike magnetic and electrostatic forces.

  4. Field Lines Field lines are used to represent gravitational fields. Parallel lines represent a uniform field strength.

  5. Newton’s Law of Gravitation Newton’s law states that two point masses attract each other with a force that is proportional to the product of their masses and inversely proportional to the square of their separation. This is given by; F=Gm1m2/r2

  6. Gravitational Field Strength of a Point Mass The gravitational field strength of an isolated point mass is given by; g = Gm / r2

  7. Value of g on Earth On the surface of the Earth the gravitational field strength is approximately constant and equal to the acceleration of free fall. This is given as 9.81 ms-2

More Related