Summary
Summary Gravitational fields
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Summary of IEB Physical Sciences Gravitational Fields section.
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Gravitational fieldsGravity :
the mutual attraction between all matter (exists due to the mass of the
objects
Newton 's law of universal
gravitation
:
other particle with force
Every particle with mass in the universe attracts
every a which is directly proportional to the
of their of the distance
product masses and
inversely proportional to the
square between their midpoints
FX MFI
✓ K9
f- = GMF -
G =
universal
gravitational constant =
same for whole universe =
6,7--10
_ ' '
N . M2
_
Kg
'
( between
.
m
MIDPOINTS)
Direction :
find using logic/ interpretation NOT a
sign
=
To → M
calculate the mass of a
planet
Free
falling objects →
9=9%2
Gravitational field diagram
¥* 7
n
n
Gravitational field (strength )
The force
acting per unit mass
=
Em '
g. unit of
-
g
N
Kg
= .
2.
'
kg.ms kg
-
_
=
2
= M g- .
field
gravitational gravitational acceleration
=
/ \
Close to surface close to surface of
' -2
of ear th = 9,8N .Kg 9,8ms
_
the ear th =
towards the midpt of the earth
towards the midpt of the earth
1 I
will experience rate of of velocity
object of 1kg '
change
free fall
_
918N -2
a force of •
kg towards in =
9,8ms towards
of the ear th
the midpoint of the ear th the midpoint
Mass → the amount of matter in an
object
force the Earth
weight > the
gravitational exer ts on
object near its surface
-
on or
any
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