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7?UNIT 4 PORTFOLTO QUrZ

usE YouR P0RTFOLTO TO FrND THE ANSWERS. THIS QUIZ CAN BE USED AS ASTUDY GUIDE FOR TI{E UNIT 4 TEST.

1. Use Sheet 3 to calculate the following net forces, indicate direction ofmovement& state if balanced or unbalanced. (t )^fl fl) t urba/nnred /ouiia=iluT' \)

b. Lltt /l\ a UAh a /an(( / /OA/ *.t^/ '- /{N+ UI

V42 -

c. 3N,4 lXf ba laocal, 3N' sN - cNTu \Y/\'

2. Use Sheet 5 and copy the question and full answer to questio n lZ. G \Q ' 7A m o1€ -scrn efr,h 7 ttt o l€t tnlha* /cn''lof firce t/o ,y,u 4t€/?n '- C n un balartce / Qru

3. Use sheet 5 and copy the question and full answer to question 13. G-)

/)r/t

-h ChanEa 1,r"cAr*?

tr ; Ir, unba/nnr€l Qu-

l,

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4. Use the back of Sheet 6 and give an exanlple of when friction is helpful andan examplewhenfriction isharmful. ( a ) A,,,'/ / ua rt7

/ar*fir/- h tee//,*S/,pl ,'t g' Ca rS h7( E /''Mt/t'4q

fi r ua o'cl

friction to the most /i -) l-.gt.r€h,'c- tJ /

Ita>t fiur./ro //itlq

frts I -rl'/14 a6. Use Sheet A5 tolistthe definition and give an example of each of

Nevgggg;-lass. (A \-.._- \ ,/.ala*'/ /:4tlra /t

lVeulw\ LstT ' 0n oil (c * a I r(s/ ld;/1 s/a / a,/ '/<s/

o4J a/1 ob,irct r'4 rnotc'Y\ tai/' sh'Y /4rmLh'c y-t l;tl it s S AC /< d o./1 by a 4 U't ba /a.'e€'J.Srce PD P/aa t Sky l,o/ {/1 fa hre uhe n z? u/t ctu,A-\--/ nu/lp I out

- ca /' 7a,.1; attat't'zt7 ou/-//t'sko.s

ln c* -The Q cce /€ roh cs., of a .Cb,,( Cf (q'ends Cr.l i/'t r4Qs S * 'zhe P/cA-

kilA mafa ltla st 6({a/€.ak / S/a,uer0lVtis a 77ucl

/l/furl/rn's 3'd: /-Of e /( {q QC*'c,v^ Y'oer'< r -S' q /t ry ucL /

and ,/;/t,P* r€acfic'n' frr/ fin'et ec{/ lt 'pa1'f f

a\ ', ,A ^ /t ,4- ^ t,- J ,r nLz B'r//oaQ

( { {./ "Bn //arn troc/ca-l " d! l/"-=W*-'7. Use- Sheet 23, draw anMel the diagram and explain why planets orbit theSun' ,t:l inerha, 'rnn ,7rr o/ a-ta/ " be/t.,teerr

( -Y3^* Causes7Lp p/antt' tu nrbrft {,rst -S'A<e/ ,U fo yrplaio uuhr'./-'nfr,

l)<( t/ h' fi'n / a ((( /q ra' rt'a't ( ' )

r t /c,c , /y - ,h l/ tq / lt lrtci/ tV

^ lfuctr Attlt /r s< rhd s s

,y^-aEb;-t-

frtt( {'rno 4,tn {rn //ime-

a.

ffir*ggf ffis*surf ng &i*tt*s'r ? Aurc&-r s Lr lvrtrn 7tro cabd/aty .

lJs< sheel s /*L + /X b mafd.

96 Matching Questiansr\6, L- Tota! distance divided by totaltin're; it is an average because ir is veryrare that the spe*ci wiil l:e constani.

qIr fi/ *-,u nretric tsli measure *f fcrce

{lU C_An ohject that appears tCI stay ift

piace that can i:e used t* tell if arrotherobject is in rnati*n

ll. ' b ti:e amounr of ntarter in an objecr.a

e. f A push *r a puil c:n an objecr; hassize and directi*n

r)B. ( an +bject's cha*ge i* p*sItlon overtime relative ta a reference point

,-lll. U . The r"ate thar veiocitv *r speed

changes; an *bjeci a{celerates lf thespeed increases or decreases or if itchanges dir*ction

Lai5. n Tire conrhir:ari*n{roiaii *iaii io;.cesuGo! oft an *h-iecr

/)ti^ ff_T*e clistan{e that an obj*cr rraveisIO, -u4divided $:y rhe tirrie it to*k tr"r trav*! the

distanc* {*x" 5 n"r!les / h*ur}i/

t7. ff A force thai *pposesiw*rksagainsti r"r"l**ti*n

lf. C Sp,ee# in a pa-riicurlar dinecticn i *x:5 rniT'hr Scuthi

tr g. I "r*easilre *f the Eravira{i*nalf ull or fircq

llo?p bftrttrcSpeed

&J!aEs

8'as

Av*rage Sp**d

Acceleration

Referenc* pc*int

Fcrce

/v*t*riry/ rri*ian,/ *r*oitry

/r^r*nced F*rce

/ ra*t.F:*rce

1 unaulanced Ferce

/ {:un ripeta[ Acceleration

z/Newton {N)

{wui*t-t

,' /////,/

/ ffi*rlon

L *qu,*$ t* anythin-c.s [*ut * N; uq/itl2a,rauEe a change in srrr:ti*n

At. Z a pullinE f*;"ce *f attractior.li:eiw*en cl:jeets du* ro therr :"r"ias:es

11dd.\ fr lrr**ieretE,*5n ls't a circu!ar mr:Ii*r'r

V rqLrai t* S hl" rvill a.r*t cause a?,4,.,Y

cha"m{t* ir'} ffi-!{}tr{}$i 1t)t

l/t . ,SAeel s 4 1 a3 ,h fratc^ vocabu/a.r.ffin*gg€ f,*re*s W*eabaxBary * QuiZLt r s€T t/frm t-

e1,, -.tlie force that *pp*ses tFre m+tion / f***t"cn,s Secofid l_aw

6_ -Y inertiaAV, t- The tendency of alI abiects t*

resist any change in rnoticn" "tul*uu" ,'{ arb;t

:f objects threuEh air

IA

X , A_ The accelerati*n of an objectdepends olr its mars and the f*rceacting on it (F : ffie).

e" ^6F*r every actian there is an equal

and opposite reaction. All fsrces act inpairs"

,/l$ L-the path of one object araund

another in space

AI 2 the curved path of a thrown objectt ilear Earth's surface

30.TJ- A center-seei<ing fcrce - it is an

ffil*n"ud force tlrat causes cbjects tofi'I*ve in a circ*$an" path

"/ Newton's Third Law

Nelvt*n's First Law

projectile motiCIil

,d free fall

terminal velocity

centripetal force

air resistance

{v

//

/

U. Athe motion of a hody when cnfygravity acts on it

/\3a L An oirjert at rest rernains at rest,and an ohject in rnotion rernains innroti*n at,:onstant speed and in a straight lineunless acted cn hv an unbaianeed force

, fl--the constanr v*lociry *f a fallinEohject when the force cf gravity isbaiar:c*# by air" r*sistanre

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