Summary A level Physics - Gravitation

Gravitation

, 11 " Sept . 2023 Gravitation


Universal Gravitation


Force
of attraction between two massa

Weak face

attraction
Force
of between 2 masses a to product of two masses

between .
squared
inversly prop . to distance centes




Fgar &
MM =
Fgrandm
Neuron's Gravitation
Law
of

Fgrav =


GM
G
gravitational constant
=




6 67x10- "Nm
ng2
>
>
-
.




Fgrau Fgrav
-




r= s between 2 centree
M
.




S [
u


" "
r




Inverse Proportion

I increase
quantity but the other decreases e same proportion.
·




↳
Product =
constant.


: A x B = constant

, Inverse Square Law



One (same proportion) ?
quantity increases other decreases
by
· --




At B =
constant


>
Gravitational force is an invese square relationship
.


Gravitational Field :


A object
region of space where an
of mass

experiences a
force.


Gravitational Field Line : Shows direction of grav. Force that

acts on a test .
mos



Test Mass : small mass that's not
enough to
affect snape of field
with its own
gravity
* m
test mas


field lines
.
X
↑
Gravitational field o
I
g grow
:



field
&
m mass in
srengue
=




M
of
=
From
= centre mass
producing
=




mass
2
g .
field
Vector
quantity .
Unit :


Why
Above
surface , earth follows inv sqdaw ....




M is constant
a changes
only
.
G is constant