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Summary IGCSSE Physics notes
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,
, 1 General Physics Mass Electric current A
Length
>
>
kg sm
SI units :
time > s Temp > K
2 Forces and motion mass
density
-
-
volume
gravity
=
10m15
Mls )
distance ( ) final ( intital
d
m
- V ( Mls )
velocity u
velocity
- -
speed t
( mls ) s t time ( s ) a Newton second law : Resultant force =
mass ✗ acceleration
1 \
acceleration 1m15 ) time ( s ) f- =
ma
' '
mlsz
weight
=
mg
Ñ Kg
'
lion / Kg ) Momentum = mass ✗
velocity resultant force = change in momentum
P =
mv
time
( Vaz ✗
Impulse Ma) -14131 ✗ Mb ) =
( Vaz ✗ Ma ) -1 ( Vbz ✗ Mb )
Resultant force ✗ time =
change in momentum
pressure = force
3 Forces and Pressure Hooke 's law area
F =
kx F
pressure
=
Moment force distance load A
=
✗
perpendicular =
spring constant ✗ extension
gravity ( kg)
N /
pressure in liquid pgh =
Pascal
'
density depth / height
4 Work and
Energy 1kg/ m3 ) (m )
Gravitational Potential
Energy ( PE )
work done force distanced move PE
mgh
=
✗ =
"
W = f- ✗ d f- mats 1 height 1m ) kinetic
energy ( KE )
f- 1kg1 gravity KE = Em v2
work done =
energy transferred
CN / Ky )
T
'
mas 's '
speed 1m / s )
1kg7
Useful work done Useful energy out
Efficiency =
gy Efficiency =
total total
energy input energy input
Useful power output = force ×
speed power =
Work done
on power = energy transformed
time taken time taken
5 Thermal Physics '
Charles Law
( volume & temp
pressure )
→
constant
Kelvin temp = Celsius temp -1273 ✓ ✗ T -
K
Boyle 's Law ( pressure & Volume → constant temp )
→ P , V1 =
Pz V2 ← volume at end
pressure
pressure temp law
( Pressure
-
T & temp volume )
at
\ → constant
start volume P ✗ T
pressure
Energy transferred =
most
" "
mass ✗
specific heat
capacity = thermal
capacity
→
Doc J / 0C
kg Jlkgoc
Energy transferred
MY
=
¥ Kg , /
kg
,
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