Talk:A-level Physics/Forces, Fields and Energy/Gravitational fields

Specification
From the OCR GCE Physics A specification. Tick with &#10004; when you feel each part of the specification has been covered. Try not to add much more than what is in this list as it would not appear in the exam anyway. Use links to wikipedia for more depth in a topic.


 * 1) understand a gravitational field as a field of force and define, recall and use gravitational field strength as force per unit mass. &#10004;
 * 2) Use field lines to represent a gravitational field. &#10004;
 * 3) Recall and use Newton’s law of gravitation for point masses in the form F = Gm1m2 / r 2. &#10004;
 * 4) Recall and use g = Gm / r 2 for the gravitational field strength of a point mass. &#10004;
 * 5) Appreciate that, on the surface of the Earth, the magnitude of g is approximately constant and equal to the acceleration of free fall. &#10004;

New inverse square law image
I have made a new diagram for the inverse square law which I think it much better. I will leave it up to the maintainers of this page to choose to use my new image: Image:Inverse_square_law.svg -- 82.153.70.188 (talk) 14:39, 2 April 2008 (UTC)

Radial fields
The first line of this topic reads: "The Earth has a radial field of gravity, which means that the gravitational field is circular and acts from the centre point." A circle is a 2 dimensional shape. Surely this should be "spherical"? EMT (Cardiff)