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A2 level physics notes part 1
- Course
- A level physics
- Institution
- 12th Grade
Comprehensive notes on the A2 level syllabus for IGCSE A level physics including all the relevant information for the exam.
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GRAVITATIONAL FIELDS↳ a
region in space where a mass
experiences a gravitational force
↑ rector
V
- ↓ arrows show : direction of gravitational force
&
-
spacing of field shows :
Strength of gravitational field
> EARTH [ (further apart =
weaker) e .
. Jupiter /larger)
g will be closer
T T
↑ radial : field lines diverge radially from earth centre
M
↳ all objects are attracted towards centre of earth
I-
Xi
·
centre of mass which
*
-
7
-r
point at we consider total mass of object to be concentrated
↓ earth benaves as a
point mass
on earth :
Earth's gravitational field is uniform
the
weight stays same
:
~ ~ v Vv
Newton's law of universal gravitation :
2 point masses attract
each other force
w that's directly proportional to product of their masses and
inversely proportional to the square of their separation
M
⑳ F
M FcMm F2
·
Fa &
distance
?
Si &
r
·
to make into equation :
constant
particles/point masses
↓
GM Mz
F universal
,
· =
w2
gravitational
constant
2
7 x10 -"NM2kg
=
= 6 .
,
,
,
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