f4 jan homework

8/14/2019 F4 Jan Homework

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Answer all questiotts.

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ffi understandtng\-/ PhyslcsPhysics is a subject thatinvestigates basic things suchas the follorving exceptA forceB energyC momentumD composition of air

Which of the following is nota field ofstudies in physics?A PsychologyB EngineeringC Nuclear medicineD Telecommunications

Base Quantlties andDerived Quantlties

3 Which of the foilowingstatements s rue ofaphysicalquantity?A A quantity that can be

measured and having itsmagnitude expressed nbase nitsonly.

B A quantity that can bemeasured and having itsmagnitude xpressed n aspecific nit.

C A quantity that can bemeasured ut ts magnitudeneed not have a unit.

D A quantity that cannot bemeasured and therefure,has no unit.

4 Which is t of SI units ontainsonly base nits?A Newton, metre. voltB Second, elvin,gram

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ictio-n,te,P-,hysies

l.l UnderstondingPhyeics

1.2 Base Quantitieq nd Dgrived Quantitfeql.J Scalar nd Vector QuantitiesL4 Mesurements

1.5 Scientifc nvestigstions

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C Kelvin, metre, ampereD Kilogram,ohm, second

Which of the followingphysical quantities s a derivedquantity?A MassB LengthC DensityD Temperature

Which of the following listof prefixes s arranged n anascending rder?

A Milli,kilo,megaB Deci, milli,nanoC Centi, milli,kiloD Giga,kilo, centi

Which expression does notresult in a derived quantityhaving a unit that s the sameas momentum?A Force x TimeB Mass x VelocityC Mass

'VoiumeI

The units of measure forpressur, ,and volume, V, areN m{ and m3 espectively.Theunitof PV s equivalent othe unit ofA workB forceC power

Which physical quantity has .incorect units afiached o it?A Force: gms-2,NB Work: kg m2sa,C Impulse: g m s=r,N stD Acceteration: s-2,N kgr

Which of the following isincorrectly tabulated?

Mercuy has a density of13.6 cm{. This s equivalenttoA 1.36 l0r kg m-rB 1.36 10 2 g mtC 1.36 103kgm-tD 1.36 lOa g m-t

A blockof wood has mensionsof 5. 0cm x 12.0 m x 2. 0 cm .Express ts volume, n m3.A 1. 2 10 2m33B 1.2x l0-2 fiC 1.2 10am3D 1.2 l0{m3

10

C

D

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Quanfity Formula Untt

Density p:Y kgm*

Speed s ms-l

Free bllacceleration

w-m Nkg-'

Momentum p=mv kgm s


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d ,moPhysltr Form lQwpulr I

Which physical quantiry hasthe ncorrcct SI uiit?

'?trtqFt!qtttffil' ,

Mass $afiCunent arnpere

Temperature kelvinTime second

74 650 nm is equivalentto

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,s*rq A 650 x lOa m\332 s 65ox o-7mC 650N 10?mD oso* oo*

Which of the following timeis equivalent o I day?A 1.44 l03sB 3.60 103C 4.32 l0asD 8.64 x lOa

Which of the following is nota derived quantity?A ForceB DensityC VolumoD Temperature

2 200 ttF wrifien in standardform isA 2.2 x l&r2FB 2.2 x 10-eFC 2.2 x 10{FD 2.2 x 1f3F

ffi scatarand:./ . \leotor ouantitles18 Which of the following

physical quantities s both avector and a derived quantitY?A Mass C DeteiryB Length D Force

19 Which of the foll-o.wingPairsconsists of a scalar and avector quantitY?

Scllarourndtv..

Speed MassWork EnersiyForce Acceleration

Distance Displacementc

20 Which ofthe following is nota,qlSivector quantity?VA Impulse C Force

B Momentum D Energa

2l Which of the bllowingstatements is not tnre ofmeasurement?A It is a process of

comparing against aselectod efrmc .rantity.B The measured quantity is

expressed with a ntiibdrand aunit.

C The unit used s alwavs nterms of base units.

Which of the followingexperimental techniquesreduces he systematic rror ofthe quantity being measured?A Conducting a large number

of ossillatione to find theperiod.

B Adjust a voltrneter tofemove its zeto errorbeforc using it to measurevoltage.

C Measure hi diametei of awire at different places andcalculate he average.

A measurement s said to beaccurate f

A the zero error s smallB the percentage elror is

smallC the average deviation is

smallD the measurement s done

carcfully

22

24 A, B, C and D show Parts of,eF!*.four different balance scales.\332ry61"6 balance is the most

sensitive?

A J--\T}I * ',.oJ

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25 The sqpitivrty sf a mercurytlermometer can be mprovedby all of the following exceptA using a smaller volume of

mercuryB replacing the sphericalbulb with a clindricalbulb

C using a capillary tubc witha smaller diameter

D using a thin-walled bulb

Which ofthe following valuesare matched with the accuracyof the nstnrment used?

Diagrarn 1 shows how thediameter of a coin could bemeasured sing a mler.

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DIAGRAM1What is &e diaoeter of thecoin?A 0.60 cm C 0.80 cmB 0 64cm D 0.84 cm

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Veinlercallipem

(cin) 'l3 1.30 1.3

l J . l 1.30 1.313.1 1.3 l .3l

13.13 1.3 1.31

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28 A micrometer screw gaugewheu used to measurc hediameter of a uniform wiregives he following results:

l .02mm l.02mm l .02mml .02mm 1.01 m

When the wire is removed,the thimble is rotated totighten he anvil and spindle.A zero error of --0.02 mmis obt4ined. What is thediameter of the wire?A l ,00mm C l.04mmB l.O2mm D l .38mm

When the jaws of a pair ofvcrnior callipers are clored,the positions fthe scales reas shown n Diagram 2.

DIAGRAM2What s the zero error?A +0.04 cm C -0.04 cmB +0.06 cm E -O.06 un

Diagram 3 shows he scalesof a pair of vernier calliperswhen used to measure hethickness fan iron block.

DIAGRAM3What is the thickness of thelron bloc! as shoyp in thescales absve?A 3.00 cm C 3.06 cmB 3.O2 m D 3.12 m

Diagrarn 4 shows he scalesobtained rom two measuringcylinders, P and e.

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DIAGRAM4

Which comparison s correctabout the sensitivity sf thesetwo measuring cylinderswhen measuring he volumeof a iquid?

P oHigh

sensitivityHigh

sensitivity

Higbsensitivity LowsensitivityLow

sensitivityLow

sensitivityLow

sensitivityHigh

sensitivity

32 A, B, C and D shows the

"6q distribution ofgunshots ired

\i9 at four target b-oards. Whichtarget board can explain theconcep! ofconsisterrcy ut notaccuracy of a measurement?

33 Diagram 5 shows he scale of

C

D

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b "micrometer crew auge.

DIAGRAM5What is the reading of themicrometer?A 7.02 mm C 2.50 mmB 7.48mm D 7.98mm

ffi $cbntfrc\--l Inustigatlong34 Which f ttre ollswing anot

a step o be aken n a scientificinvestigation?A Idenrify

the problem.B Making an intelligentguess r hypothesis.Design and perform anexperiment to verify thehypothesis.Rgpeat the gxperim,entuntil the flnswer matclesthe hypothesis.

c

D

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35 Diagram 6 is a graph which/s( shows he relationship etweenKP v and n.

DIAGR{M6The relationship between vand u is represented by theequation:A v:0 .1- uB v= I +u

IC v:0.1- o

Itn 7=t+o

36 Diagram 7 is a graph which,qSa shows the relationship\3!!'

benveen hysical uantiries,and Q.PI,Nt \t \o+a

DIAGNAMTWhieh stafement about thegraph s correct?A The gradient ofthe graph

is 1.B P is inversely proportional

to Q.C The equation fthe graph

i sp= _ia

Which ofthe following graphsobeys the equation xy : k,wherekisaconstant?Ai c i

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(S) Th|r Bt{rd|'$i tht*r drgcidsu to rspsct thcexperimeirt sing a micrometer scrw gaugeto measure he diameter of each of the fivebalt bearingc. The average volume is thencalculated. He notes that the micrometerscrcw gauge has a zero error of -0.01mm.The esulg of his measurement reshorrn nTable 2.

TABLE2(t What does he low relative deviation

indicate?

ft mark](ii) What is the average diameter of the

ball bearings?

fl markl(iii) Calculate the volume of the ball

bearing using he following equation.

v =(nf3

where is the radius of the ball.

(c)

[2 narlcs]

Based on the answers in 2(a[iii) and?(txiii), which of the resrrlts. s

-moreeeeiiilite? EXpldiiit6iri itii$lvf:

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3 (a) Diagram 3.1 shows the results of threeshooiere +'irshooting competition.A\ ,/=\ z.-1-\((o) (o) (o)V/ Y2 \ySlpSgrA ShooterB shooJerc

DIAGRAM3.l

12.u r2.85 r2.u 12.85 12.87 t2.85 0.06

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Which shodtcr is consistent but notaccurate?

ft narkl(ii) Which shooter s accurate ut not

consistent?

ll nark)(iii) Whicb shooter s both accurate and

sptrsiclExt?

tt mark)

In an experiment, a student uses a voltneterto messure he potential difference and anainmetei to ineasufe the euneat parisingthrough a lighted bulb. The readings arishoum n Diagram 3.2.

Write down the readings of thevoltmeter and he ammeter.Voltmeter eading

Ammeterreading :[2 marb]

(ii) What is the firnction of the built_inmirror in both meters?

(i)

(r)

[t marlcl

(c) The student oesnot notice hatthe voltmeterhas zero error but goes on to repeat themeasurment nd gets he same eading.

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WhrtdoyuuunderntansfvsJfinerernwith zdro error?

! . ll markl(U Would you eonslder h6 vshmcrer

readings cCurate,r cjnsistent?xpbinyouranswer.

(a) (i)DIAGRAII{4

Name the part labelled Y.

fl markl(ii) llfhat is the ftmction ofy?

[l tnarfr]

(b) The intemal diameters f-or four difrerentparts of the pipe are measwed and recordedin Table .

2.54 2.s5 2.54 2.56 2.55TABLE 4

(i) (ii) What s tbs pff*t rf this prl*tirs mthe iral measued uantity?

ll markl

trSectia

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*f, Diaerarn 4 shows a pair of vernier callipers which@;trlt:o

for measuring he internal dianeter of a

...: Diagrsm 5.1 shows ristriimerit p lrrhieh s usctl1ffi at measuring he ength of a wooden block.

P

Woodenblock

DIAGRAMS.I(a) (i) Name nstrument p.

fl mark)(ii) What is the accuracy f instrument p?

p markl

Diagram 5.2 shows wo types of rulers, Aand B, that can be used or measurement.

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Rulcr4

(e)

Sectio

7D

gTl 2 3

RulerBDIAGRAM 5.2

(i) Which ruler is moie sensitivb?

(ii) State ones(DXi).

ll markl

reason for yor,u ar$wer in

(t Why is there a necessity o measurethe diameters t four different parts ofthe pipe?

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@&** Physlcs orm4(J,ayrl- I

Section B

Answer arll questions.

6 (a) Explain each of the ollowing terms as applied o measurement. llustate your answer with one example.(i) Accuracy (iD Sensitivity tq mortrs,l

(r) An iron rod has a shape bent) as shown n Diagram 6. You are old that he ength and diameter areabout30 cm and 6 mm respectively.

lYssot anddescribe11: T:uf*u ,"??f,#*Huro *""ruo thediameter nd he ength f the od.Give reasons for your suggested procedure. *.sqrv rw'Err

[6 nark)(c) A panicular sftdent used a v-ernjer calllRen to measBr he diameter of a rod. she nqted that the vemiersauiperc has zerq eryoJ of -{,02 cm' She took five different

-"us*e*entsat five different parts of therod. The following are the results she obtained.

0.61 m, 0.60cm,0.6l cm, 0.60 m, 0.62 cm

(i) Using hese data, calculate he rnean diameter and he relative deviation.(ii) Would you considcr her results aecurate nd consistent? Give your reasons.

(iii) what shoulal hedo with the zero e$or on the vemier eallipers?(iv) suggest one- measuring instrument which is more sensitive thanJustifyyour choice.

Sec'tion C

7 Diagram 7 shows he eye positions of four students, A, Bi c and D, while reading he scale of a measuringcylinderduring an experiment.

what s meant yparallax rrcr?fr markj

(0 with reference o Diagram 7, state he readings obtained by each student. comment on why theeadings obtained are he same or different.

-r *-"[6 martcs](ii) Hence, determine which student obtained he most accurate eading. state his reading.12 marksl

(c)f;*""*l::ffitt.

above s repeated, uggest ne way by which rhe above eiror may be rediiced diiring

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12marksf

ll mertrlthe vemier callipers.

12marlesl

(a)

(b)

DIAGRAM 7

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f4 jan homework

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