These notes include notes on electrostatics, electric circuits, gravitational fields and photons and electrons. Summarizes everything you need to know for these sections in one or two pages according to the SAGS document. Learning for your next physics exam couldn't be any easier!
GRAVITATIONAL FIELDS WHEN DEALING WITH RATIOS
consideringthefactorthateachmass ordistance
law of Gravitation
Newton'suniversal has changedby
Everyparticle with massinthe universeattracts
factors
every other particle witha force which is directly subin intoformulas thatdietormasshaschang
proportional to the productof their masses and egoIf distance
isdoubled whatforcewilltheyexerton
inversely proportional to the square of thedistance each other
between their centres Fnew
iffy from
omit
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distance between ledwat
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617 10 NM kgY Eg
leg
weight theEarthexertson anyobjecton
gravitationalforce
or nearitssurface
giweopjugiftajfiin.am
is changed by afactorof a so thatthenewfore
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experience aforce describe NB Bothobjectsor
define
force actingper unitmass 9m Is t
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f force newtonsordlaw
direction specificcan
NB
I I
togravity
It
acceleration due
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isalway
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constant does not
change
oppuniversalgrov
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m.g
M massofplanet ing
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of
gsgravauf itsweight be when it orbitstheearthat
distance
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of
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figusg g
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largertheforce
to acceleratetow
MASS US WEIGHT
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WEIGHT inBarons groupie
amountsubstancethat force of attraction between
a planet
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Measured in Rg Measured
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at
goal h Alsothereis a strongergravitationalfieldatthepoles
notwhen dealingwithsmallobjectssuch aspeopleandsatellitesthedistance
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of
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ELECTROSTATICS
notify
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mama
are
which
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in if
of
principle
ofCharge
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Insulators
charge isthe principle thatthetotal
canbecharged
conductors
conservation
of electric
charge
metals by
makingcontactwithanothercharged
inan
object
isolated orbyinduction
systemneverchanges oblationinduce
charged
on
charges
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will bethesum the
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of oneachobjectdivided 1
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anew
ELECTRICFIELDI
anew New
chargeon
each
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at on1st
originalcharge
object o An electricfieldasa regionofspaceinwhichanelectricchar
ai origchargeonand10 experiences aforce Thedirection theelectricfieldata
of
point isthedirectionthat a positivetest charge tie
Takes account
shyofcharge wouldmove
if placedat thatpoint
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when I chargedobjectstouchelectronstransferfrom
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most positiveobject outand awayfromthecharge
chargeeitherhasanexcess of electrons
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isdirectlyproportional totheproductofthechargesandinversely ones where
you havetoworkoutresultantforces
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answers
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