90
edits
Changes
Jump to navigation
Jump to search
Line 113:
Line 113: − + + + + + + + + + + + + + + + + + + + +
Universal Law of Gravitation (view source)
Revision as of 19:57, 3 December 2013
, 19:57, 3 December 2013→Concept #
==Concept #==
==Concept #2 - Newton's law of universal gravitation==
Newton's law of universal gravitation states that every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. This force acts along the line joining the two particles. Separately it was shown that large spherically symmetrical masses attract and are attracted as if all their mass were concentrated at their centres.
For non-symmetric objects, the masses will be concentrated a the centre of mass and the distance between these centres is what will be taken as the distance
[[Image:Gravitation%20for%20wiki_html_39d0b1a1.png]] <br>
F = G m1m2 / r2
* F is the force between the masses,
* m1 is the first mass,
* m2 is the second mass,
* G is the gravitational constant
* r is the distance between the masses
In SI units, Force, F is measured in newtons (N), masses m1 and m2 are measured in kilograms (kg), and the distance between the masses is measured in metres.
<br><br>
===Learning objectives===
===Learning objectives===
===Notes for teachers===
===Notes for teachers===
''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''
''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.''