Summary Edexcel A Level Physics Student Book 2 - Unit 12 - Gravitional Fields

Gravitational Fields

, ① Gravitational field strength
·
A force field is an area in which an
object experiences a non-contact force
.




·
A gravitational field is a force field in which objects with mass experience
an attractive force .




·
Gravitational field Strength (g) is the force per unit mass exerted by
a
gravitational field on an object .




Types of gravitational fields

·
Uniform field : Save gravitational force on a mass
anywhere in the
field
.




rvrouvrovvvvvv

-




uniform field
gigravitational field strength
F
- F force
9
- =
I
M
m = mal)




·
Radial field : Force exerted depends on the position of the object in th field
.

g is related to ~ (distance) via inverse square law :




t
* - -
.....
g
=




radial field