GRAVITATIONAL FIELD
he attractive force
↑
between the point masses is
directly proportional to the product of the 2 masses
and inversely proportional to square of their
separation.
N eWtOn's
Law of
F He Gravitational constant
~
·
1 F Mz I
Gravitation = 6.67 x 10 "NM2 15-2
=
unit: N
ten
strength of
g-field
·
her?
Fg M2; test mass
q ⑧
i
granational
I
Field Graw, force unit mass (En)
per
g: Tig
9
=
M2 > Fg= AM
strength
g ↳9 4 fre
1. g=#II
so
9.8 1
unit: N19 "M5- was
field strength of M1,
grav,
at a distance from centre
~
, g
=
GM- '
'
!
'
%
'
i.
9=9-1%7
"
REY
.
↑
" "
"+
to R
since his small compared :
'
1 1
i '
19 a-fg-i-9.HN ; i.
-1
Planet 's
= kg
Note : For
large R
g- field constant
cuz lines are always parallel
surface
3h
¥ # t.tt
T T T
Ir
9.81111kg
-1
radial uniform
I Assumptions
of earth
:
Uniform
1) density TS
7¥ TRE 2) surface of earth is uniform ,
uniform sphere
I
Earth is a
Inside
1
* at centre of Earth ,
9.81 - -
- -
9=0
Planet 's
m
r↓
of planet
attracting us↓→rRE
←
¥É > RCM )
Surface once inside E ,
M =
pv
1) density p % →
}
,
=
mar
M ✗P
2) Volume ,
V =
g- Xp }
→ ✓ xp ,
3) g
=
9¥ →
g ✗ % + map
garriga r
he attractive force
↑
between the point masses is
directly proportional to the product of the 2 masses
and inversely proportional to square of their
separation.
N eWtOn's
Law of
F He Gravitational constant
~
·
1 F Mz I
Gravitation = 6.67 x 10 "NM2 15-2
=
unit: N
ten
strength of
g-field
·
her?
Fg M2; test mass
q ⑧
i
granational
I
Field Graw, force unit mass (En)
per
g: Tig
9
=
M2 > Fg= AM
strength
g ↳9 4 fre
1. g=#II
so
9.8 1
unit: N19 "M5- was
field strength of M1,
grav,
at a distance from centre
~
, g
=
GM- '
'
!
'
%
'
i.
9=9-1%7
"
REY
.
↑
" "
"+
to R
since his small compared :
'
1 1
i '
19 a-fg-i-9.HN ; i.
-1
Planet 's
= kg
Note : For
large R
g- field constant
cuz lines are always parallel
surface
3h
¥ # t.tt
T T T
Ir
9.81111kg
-1
radial uniform
I Assumptions
of earth
:
Uniform
1) density TS
7¥ TRE 2) surface of earth is uniform ,
uniform sphere
I
Earth is a
Inside
1
* at centre of Earth ,
9.81 - -
- -
9=0
Planet 's
m
r↓
of planet
attracting us↓→rRE
←
¥É > RCM )
Surface once inside E ,
M =
pv
1) density p % →
}
,
=
mar
M ✗P
2) Volume ,
V =
g- Xp }
→ ✓ xp ,
3) g
=
9¥ →
g ✗ % + map
garriga r
