Summary
Summary Grade 12 IEB Momentum and impulse notes
- Course
- Physical Sciences
- Institution
- 12th Grade
Summarised notes about momentum and impulse. IEB syllabus, grade 12.
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GIADEKLERKMadelads del Truss
OMMFINN
MMvertices TUI MM
847
if
it
AANNDIMMPPOUSÉ
i24
07
MANNIisameasureofthestateofmotionofanobject
o tocontinuewith itsstateofmotion
o object
itindicatesthetendencyofan
momentum isavectorquantity 1 270
thereforethedirection of thelinearmomentum of anobjectisthesameasthedirectionofthevelocityoftheobject
2 90
Stunit kgm s
3 180
Bugs
momentum theproductofthemassandthevelocityofaparticularobject
p mu Orifice para whenanobjectismoving atconstantvelocity ina straightline itslinear
p
momentum pen momentum isconstant
M inkg brillante
conextrema
mass adv
V velocity in Mis
p 26.5mm
a v
p hm
CHANGEIN MOMENTUMOFANOBJECT
inorderforthemomentumofanobjecttoremainconstant themassvelocityanddirectionof theobjectmust
remainconstant
Shouldmass velocityordirectionchange theobjectwillundergo achangeinmomentum Ap
Changein momentum finalmomentum intialmomentum
Ap Pt Pi but p mu
i sp mut mui m Uf Vi
VECTORDIAGRAMS
themomentum vectorsmayberepresented in avectordiagram
Eachvector Pt PiAp canberepresented byanarrowwhere thelengthrepresentstherectorsmagnitude
thearrowheadrepresentsthevectorsdirection
x
IMPULSE
Productofthenetforceandcontacttime
impulse J Anobjectsimpulse isthesameas itschange in
FnetA Ap OR FNETAt J momentum
Fort Netforce N Impulse is directlyproportionaltothemagnitude
At Collisiontime s ofthenetforceappliedto anobject 3thecontact
Ap J Changein momentum impulse kgmis timeoftheforce
, GIADEKLERK
Madelads del Truss
RATEOFCHANGEOFMOMENTUM
Net resultant forceactingon anobject
vertices
847
Fret
11 if
Changein momentumis constant theforceexperiencedby anobject isinversely
it
proportional to thecontacttime of thecollision
CONSERVATION OFLINEARMOMENTUM i24
07
thetotallinearmomentumofanisolatedsystemremainsconstant
Anisolated systemisasystemwith noexternalforces
4generaltypesofcollisions
o o
270 after collision
1 seperatly
1 Collisionswhereobjectsmove
beforecollision
90
2dropped
3 Collisionswhereobjectsare verticallyontoa movingobject
4 Explosions 3 180
Bugs
Orifice
MIVei t Maki Ma
Vat MzVef
para pen
con
According Newtonbrillante
extrema
to adv
III whentwoobjects collide theforceexertedonbothobjectswillbeequal in
magnitudeThetimeofcontactwillalsobethesame
Fromtheformula fret At Ap it canbeseenthatthechange in momentum will beequal
26.5mm
2 Poet Patt
MaVait MzVai me Ma Vf
3 Poet Patt
Marait Ma o MitMa Vf
Objectmoving vertically hasa horizontalvelocityof zero
4 Pbet Aft
M Ma Vi MIVIE Marat
Explosionshappenwhena stationaryormovingobjectbreakapartinto 2 ormoreobjects
ELASTICAND INELASTIC COLLISIONS
elasticcollision Collisioninwhichbothmomentum kineticenergyareconserved
inelasticcollision Collisionin whichonlymomentum isconserved
kineticenergy Istheenergyofanobjectas a result of itsmotion
kineticenergy Ek amv2
Ek kineticenergy J
m Mass Kg
V Velocity m s
energy is a scalarso does nothave a direction
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