A summary of Grade 12 NSC Physical Science Physics Sections

.p M .V. ' j<"\ kg fY"'$
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1
-

COLLlSl'ON,'S
- - - - -- - - - - -

.flCPLO-SIONS:
- - - - - - - - - I
I '
~r.e t fO•Ce. cause( a cho .... ge rn rnomencvm and . ,rripu•se 1
t, sepe,a ce oncl ren-.oin GI part·.
I
rn2,Vi1. = m,VF, + mzVfZ.
/-tip= l'riAV = FAt
,m , v; , t-
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! 1m,\li1
1
2.
I
S11p11roce one!

-t .m1\l.i2.:.
COmb1ne:

Vf cm, -tm-i)
, ct-on9e 1n mom•" tot\'\ : 11V1po1se.l I
I - - - - - - - - - - - - - - - - - - - - -~
,---- ---------- . ; 3. to9etne, oncl seperote ·.
j IMPULSE ) NII: ;~crump1e iones and Sopt:,:
: Vi Cm, -t- rn 1-) = m, Vf I t- m 1 Vh
: _ OP ,___ - - ---------- - - - --- - __ ,
,'--..:.
fntt____
•·-4 "t ..___ _,
to reduc_e a chan9e ,,, ~omentum
a.t

IN tlleAS£ T1111\E TA1tEN foR •05ncrs· 4 d\Je to th• conserva tic,,.. Of,
TO C0"'1E TO ~EST, mom en tum :
.
• • ('et pirce OCtll'\9 en the ObJt>CtS
oecreoses ctecreosec! cho,-,ce Of
4 doe to Neunon JIL ;
1nJ0r~.
4 t1rrre ouer · wh•Ch the fOrce _'ac t s er,
- rema,ns constant
becovH fnet ol 4 t. and
I
-l-tnet .1P • icons~rvotron
the Objects ,.s eq,ual chon9 'e ,,;
ckorice Of ,nJu'!:J ,5 recJ vcPd I( tM Of t,,,omentum) N"IOIY'lenturri 1,s eq,va•. ,
zone
,- - - - - - - -- - - - -
* Red1Jc:ed Q Cl'\an9e 1n rnomentllrn
HASTJC COLLISION:
'
1

'
* 1n conboct .
red'vc1n9 ar, ObJ ec tr \/etocit~ . , k1net.,c ene,9 r,; •.S
Increase 1mpv1u b~ 1ncreas,ns the amoont Of tarrie ObJ•cn are :cons1?,ve,cl f1<i: [kf
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I ---------- ,
1 oreo und~r a
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fnet
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vs h.t : 1nipo1se 1
; INHA$ TIC
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cou, rs 10 !ti: I

t----- ----------- -- - - - 1 1 1onet1c. ener99 15 not
:qrod,ent Of a · llP' vs At · ; . Fnet 1

: conserved · (1< i ·* t kf
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i- - - - - - - - - - - - - - - - - - - - - - - I
: en_e.•9~ 10.s t to heat, 1
, Soi;nd, de.for motion 1
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~,
L ______ - - - - - - ____
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,------------ -- -- - -
[VERTICAL PROJ't,TILE MOTIO~ 1' Whenon Object- I{. th(OU,)('I up ,
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!,[b_
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; vf ~vi, -t
9~t , I
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1 .l)lJ :: \Ji At+ 19.At I
-11 :I (~roond
. - - - - - - - - , I A~ t,. ,J ,____,...........,,___ At .1
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' v(i: v,2 + 29At
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/1,t Ia,: -q,irns
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At
\J, ... r---.
,,.-.I
po i n 1t Of
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booncQ

.. L\ 9 ' (\If: V•) At : Q. r--~_._,- Ae .
L
' Ne·r


,,...
00 0.,
fOrc:.e 1'


Sa=• d,retJOr, f
must be I
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j___ - - - - - - - - - -·
___________ _ _!
,- !
1 8011 rans 1'+ 1
: f!Om rest : 1

T v, -
ll_
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It.~
I ~ A.t v,lorO Vf - V1
I
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r epJI tO J 1 '1/r .dt: llf
1
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T 80UNC1Nf. ~ALL :. When a boll tmpulSe = AP : fnet At
:A.V~ At 111
I I f bOonce.S, the 9roond ~r-c-ertJ o,..~pword 1rn pu I IY'I ( V f - V, )
I '
I fOrce 9reoter tha" the downward
I ; f'net.
•o.r--At. I fOrCe Of 9rQll•t~. . , •
·, .. mc v,-vf): (fv-f d}(tr-·tij
:
I
~ 5-l
_ _ ____ _ _
I
I :. Fne t : L>pu>o rd - F9 , a~11;9
• ha rde r bc,11 = less con t act e,me w, th 91 ou,... d
= g,~ate, upwa rd rorce beca<JSe 1esr tk IS
IO St to heat., 50vnd one! cl!'fo•,.,..,otron .