1 weight
mm
a8m.sa
Fg mg9g
Forceofgravity N
theearth'sgravitational forceonobjectsalwaysactsdownwards
2 Normalforce
theforceis a reactionto theobjectpushingdownon thesurface
actsupwardsontheobject toprevent it frompassingthrough the
surfaceit'son
balancesoutforcesactingonanobjectinthedirection to thesurface
FN Fg FV FN Fg FN FgtFv
Erg
I
i
i aagggg.no
aance
Iii
sitiation
, usnPpPui dappletabby
aperson anotherobjectonanobject
Hattinstringscables
inbothdirectionswithinthestring
actsequallyoneachobjectattheendofthestring
5 Frictionalforce
alwaysactsparalleltothesurfacewithwhichtheobjectisincontact
actsinoppositedirectionofmotion
morefrictionoccursonroughsurfaces
Twotypes
static actsonanobjectonlywhileitis atrest variesfromaminimumtoamaximumvalue
MsFN
Max Wadein
Ffg
Yan
m tic intimidation
ieiia5fninaaiis.am unit
kinetic whenthe appliedforceexceedsthe
magnitudeofthe staticfriction theobjectstartstomove
maximum
whileinmotionobjects
For MrFN Usedherself
saine EEtirn
moving
ftrictions
coefficientofkineticfriction
the
not sameasthe coefficientofstaticfriction
Greaternormalforce astheFappliedincreases
greaterresultingfriction theFstaticincreases
Taste slidestime
in
KineticFriction d
remainsconstantevenwhenrappliedincreases
, off dg 5175
a g FH62,0560
1
18.1 FHTFFma
1711 12 62056017Fs602
fr an
EE aia
18.2 BrickY isbeingpulledoffofthesurfacebythe62Nforce lesssurfaceareaisincontactwiththe
surface brickYexperienceslessfriction
mm
a8m.sa
Fg mg9g
Forceofgravity N
theearth'sgravitational forceonobjectsalwaysactsdownwards
2 Normalforce
theforceis a reactionto theobjectpushingdownon thesurface
actsupwardsontheobject toprevent it frompassingthrough the
surfaceit'son
balancesoutforcesactingonanobjectinthedirection to thesurface
FN Fg FV FN Fg FN FgtFv
Erg
I
i
i aagggg.no
aance
Iii
sitiation
, usnPpPui dappletabby
aperson anotherobjectonanobject
Hattinstringscables
inbothdirectionswithinthestring
actsequallyoneachobjectattheendofthestring
5 Frictionalforce
alwaysactsparalleltothesurfacewithwhichtheobjectisincontact
actsinoppositedirectionofmotion
morefrictionoccursonroughsurfaces
Twotypes
static actsonanobjectonlywhileitis atrest variesfromaminimumtoamaximumvalue
MsFN
Max Wadein
Ffg
Yan
m tic intimidation
ieiia5fninaaiis.am unit
kinetic whenthe appliedforceexceedsthe
magnitudeofthe staticfriction theobjectstartstomove
maximum
whileinmotionobjects
For MrFN Usedherself
saine EEtirn
moving
ftrictions
coefficientofkineticfriction
the
not sameasthe coefficientofstaticfriction
Greaternormalforce astheFappliedincreases
greaterresultingfriction theFstaticincreases
Taste slidestime
in
KineticFriction d
remainsconstantevenwhenrappliedincreases
, off dg 5175
a g FH62,0560
1
18.1 FHTFFma
1711 12 62056017Fs602
fr an
EE aia
18.2 BrickY isbeingpulledoffofthesurfacebythe62Nforce lesssurfaceareaisincontactwiththe
surface brickYexperienceslessfriction
