mock 2011 paper 2 (ifthithah)

7/30/2019 Mock 2011 Paper 2 (Ifthithah)

1/15

MADHRASATHUL IFTHITHAAHMock Examination-2011

ADDRESS h'4mArH/ NUMBER

PHYSICS I/, 5054122,GRADE 10 , , September 2011PAPER 2 Theory 1hour 45 minutesCandidates answer on the Question Paper.Additional Materials: Separate answer sheetsREAD THESE INSTRUCTIONSFZRST : BWrite your candidate number and name o n all the work you hand in. \* /,[pWrite in dark blue or black pen.'You may use a soR pencil-forany diagrams, graphs or roughworking.Do not k e aper clips, highlighters, glue or correction fluid.SectianA : nswer all questions.

Write your answ ers in the spaces provided on the QuestionPaper.SectionB :Answer any two questions. -

The number ofmarks s given inbrackets [ ] at the end of each question or pp$t question.For Examiner9s--UseSectionA

Total -/

LThis document consists of 15printed pages-MADHRASATHUL-IFTHITNAAH I C-.. - .*. :--*Na i f a r u , L h a v i y a n i At011 . " ' o

e.

- . . ,I


2/15

SectionAAnswer allquestions in this section

1 Figure 1 shows a supermarket trolley. '9 'Figure 1

1:I

I frontj wheelsIII I

The weight of the trolley and its contents is 160N.(a)Explain what is meant by centre of gravity.

...................Z+. . ~ n . 9 . ~ . . ~ ~ . ~ ~ . . . ~ c ~ n p . ~ . . ~ h ~ . . . c ~ n t ~ . ....nbJerl..,$1;.... ,.......... .....T&.,c?PJ~,!..& ~ t? .kh&.. e4fi&. . . m e x s . . ~ . ~ . . ~ bc&:C! ?PEWS (lk(b) P andQ are the resultant forces that the ground exerts on the rear wheels and front

wheels rdspectively. Calculate the magnitude of(i) forceP, '3 "~ I

Madhrasathul Ifthithaah Mock Exam - 201 1 grade 10Dept. of science PHY P2


3/15

(ii) force Q.- 0 " ' F '...........................................................................................................................................

..................................% . . = 1 ...................... ..%..t4..: ...................................... (3)(c) Calculate-the minimum force t needs to be appiied vertically a t A'td lift-the frontY " -heelsoff he grbund;

........................................................................................................................................... (2)2. In an experiment to measure the temperature of the flame of a Bunsen burner, a lump of

copper of mass 0.12 kg is heated in the flame for several minutes. The copper is thenI l jtransferred quickly to a beaker, of negligible heat capacity, containing 0.45 kg of water, and I I;,) Ithe temperature rise of the water measured.

specific heat capacity of water =4200 /kgKspecific heat capacity of copper= 390 J/ kgK

(a) If the temperature of the water rises fiom 15 "C to 35OC, calculate the thermal energygained by the water. . .

3...........................-......U ...........................................................................k............ ..........................r i 3 . ..X!.P..~~^J...,.....*.................; (2)(b) (i) State the thermal energy lost by the pper, assuming no heat is lost during its transfer.......................................................... . . 9.&.... .................................................(ii) Calculate the fall in temperature of the.........................g ...Z.rn.A..3...:

Madhrasathul Ifthithmh Mock Exam - 20 1 grade.10Dept. of science PHY P2


4/15

2 1T-t--w .3 (a) A cheetah accelerating uniformly h m est reaches a speed of 29m/s in 2.0 s and4 + then maintains this speed for 15s.

Calculate its acceleration, ,& j . . ..........*...... ,?.x.z3.t..a9-- '393. s.&.a.6&g? (1)............................................... ......................... ....

(b)The cheetah andan antelopeareboth at rest and 100m Parthh. e cheetah starts tochase the antelope. The antelope takes 0.50 s to react. t thenaccelerates uniformly for2.0 s to a speed of 25 d s and then maintains this spekd. The graph shows the speed-timegraph for the cheetah.

(i) Using the same axes plot the speed-time graph for the antelope during the chase.-

L -(ii) Calculate the distance covered by t h e e e n the 1_7s after the cheetah started( : . ;to run. . ,........................

3 . w 'T.........................z .... z.s. .1..................................*...... ....................................(iii) How far apart are the cheetah and he antelope after 17 s?

.. -Madhrasathul Ifthithaah Mock Exam -2011 ' grade 10Dept. of science PHY P2


5/15

5

4. (a) Define Density

................................................................................................................... s (1)@) Fig 4.1 shows a swimmingpool with abase of surface area 80m2. The pool contains water-

of density of 1000kg/m3 to a uniform depth of 1.2m

surfacs area 80m2

A second pool of base area 40m2, has water of same density and depth as that inpool in part (b). Determine the pressure of the water on the base of this pool

5.............................. ......................m.?5!%?0nx&ddZ 3 9.aO-N ..............................

.1Comment on your answer

~adhrasathul fthithaah MockExam - 2011 grade 10Dept. of science PHY P2


6/15

5.A spring is hungfrom a beam, and a load is suspended fiom it.Fig. 5.1 shows the spring before and &er suspendinglhe load.

\ (a) Using the letters on Fig. 5.1, state which distance youto find the extension of the spring.- 1'@) An experimenter;'&asures the extension of the spring with different loads, and o k i n s

. \ ' ? \ < . ' . ^ i l ,-.the graph shown in'~ i ' ~ ..2. . . \ . ,

Fig. 5 3

Madhrasathul Ifthithaah MockExam - 201 1 . grade 10Dept. of science PHY P2


7/15

(i)When the experimenter hangs an unknown load on the spring, the extensionof the spring is 1.7 crn. , - . .Use Fig. 5 3 o find the weight of the unknown load. Jl'................................eight = .Q.z.~. N (1)(ii) State the value of the tension in the sprini when this load is hanging fiom it.

4 . 2 ~ 1 . 3 tension = ..... ?:..% ......e...... (1).....(iii)The load is pulled down fiuther.State what happens to the......... ,t,,&iI?.. /rd~li.rncS:~ (1)(iv) After being pulled down, the load is released.State what happens to the load immediately after it is rele.... . ...................-.....-.......*....el!!..?c!* . .................................................................................................................................................... (1)6. (a) State what is meant by the thermalexpansionof a solid.

.. -. . -.............................................@!!eh...*~t??P....#k.. 0ti4. -!-J.%...L..*..~..Y&~s&..~ (1)(b)Fig. 6.1 showsametal rimand a wheel. The inside diameter af the metal rim is slightlysmaller than the dimeder of thewh e e 1 , ~ e neated and plthd-dver thewheel, the 1rim fits easily. L \. - . -

x .

Fig. 6.1(i)Describe what happens to the dishme between atoms in th e Grn and to the motionof these atomswhen he rim is being heated.- .................... h&.d;ol .~h~, ............... ..........,%st; ....&.&rs.t.f?.~&.... $ . t ~ . . & . r n $ ..... :..........k~m ~ ~ . & ~ ~ . c Q . ~ . . . : I ~ c K ~ ~ s . ~ ~ L L , . . . ~ ~ R ~ + w..Madhrasathul IfUlithaah , Mock Exam - 2011 ' grade 10Dept. of science PHY P2


8/15

(ii) Explain why the metal rim will now fi t tightly on the wheel when in everydayuse.

........................ ..... ........at1~~m~. . : . rd i~ . .m.&. irn.~*..!~~s.~~.p.snd ~ . Q . M ~ ~ P A (3)/& I 4w kndInr o l mt3drl c u k ) , f i r immy n o w f i f ~ dflL9 u?r as vim glolu + ~ cA + ~ v ) s I. y ~ d i ~ - ~ O I L I U d e-7. In the circuit shown inFigure1 he resistor network bhveen the points P and Q is +L ,m g,,tb ,dconnected in series to a resistor R, an ammeter and a battery of negligible internal resistance. +rgt\tq

"I,:---- -R b 1--. : Figure 1--(a) Determine the equivalent resistance of the network between the points P and Q. . . . .. ,......&. .' . < .

R I RI.............................................................................. ..:- C-R,.+ R2 -.....,...............................................................*k.?k..4Ca....;................ISX 9 0 r Zs&-

C.....................................................................................................................................................................= l 2 . 9 - a 4.................................................................... . . . ~ 3..................@) (i) If the current through the ammeter is 50mA, c a l c u u c h a r g e hat flows

1 through the resistor R in 4 minutes............(...?,...d* ....................................................................................................................!so Le. . . . . . . . . ........... ! J..................................................

(ii) If 18 J of energy are transferred to the resistor R in this time, calculate thepotential d ifference across R.

&%..I% .... ...............CI-.../.............. ........*.....--...-..-OF.................................. ce..

= 1 . cvMadhrasathul Ifthithaah Mock Exam - 2011 . grade 10Dept. of science PHY P2


9/15

(iii) Calculate the resistance of RS..................................... . . ~ . ! . ~..............................................................................................F ( 5 6 ~ c o - 3 1-- 0 '05 rc p 0.9....................................c:!? .............................. ..7 ..........A0.9

...............................................30CL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-.S.i.~.\.....i..................... ..

(iv) Calculate the emf of the battery. ., . . , . - . -....................... .....c...,.r........ .-....................................................

. . ~ %.............................................................................. ..............i:..;..:..i..+..wi+A*: ...........-.....-6)8. In Geiger and Marsden's a-particle.scattering experiment, a-particles were directed at a very

thin gold foil. Fig. 8.1 shows five of the nuclei of the atoms in one layer in the gold foil. Alsoshown arethe paths of three a-particles directed at the foil.

-. - a-.. . .. . -\,. -

. . . . :.... . . .

, . , *. . . .

. . .g.;l . . ,.(a)On Fig.8.1, complste thepaths of the three a-particles., . . . . (1)7@) (I) What result of the experiment confirmed that an atom consisted of a very tiny charged

. . . . . .con,..containing lmost all theemass f theatom? : . . '.% . - .;- ......~.; - . . ....................BR-8. .., hs...fi~..rct~al,~.;..tza~i~f~.,~..r~t. .@[email protected]?~I: ' .~ .f ) f ld.... J '..................................................... . . . . . ..... . . . . . . (1)................ .....ii)What is the sign of the charge on this core? fl.g.5?dkK1;: 31.;...,hd?*1)

(iii) What occupies the space. . . . . ....... ..................................


10/15

Section BAnsweranytwo of the following questions9 (a) Light changes direction s fiim air to wata'.

(i) Name the process of in this way: '............................................................................................... (1)\ (ii) Explain whyais process takes place.............B.%c~.u$.c?.rn~. C ~ ~ .as..&kt..;s(b) The diagram represents some fish under water and a butterfly above ,the water.

V (i)Draw a ray to show the path of light travelling h m e butterfly to the eye of fishB. (2)'Y(ii) The wavelength of the likht in 'the water is 414 nm.CU\ a mrefractive index of the water = 1.53 --& 4 / 9 h . f l - - . / - r 3 ,Fw4* 3Calculate the wavelength of the light in air. A , d . w ~ m -.-. : spped of / ;ghf i)? 9 iv .........l.n..Z.. Speed. @ ,/tq+ , .n . .. .> .\ ,:, ~ , . * \.'h:..A ............................................................................................... L p--r&;,.. .,/.xSr, =. ,- . :9. ........... ....................................... ~ . . ~ . . . % : . . ~ ~ ~ ~ . . ~ ~ ~ . 1 . ~ ~ ~ . ~ ~ ~ . ~ . ~ ~ c . . ~ 1 ' . ~ . sri ?Q-Y!p . . -, 7 .Wavelength= ............ (3)

(iii) Explain what is meant by rriticarangle. ............ refvf ic teda n @ ~ c..a;t..whka ..*.-... k~y..Aulc)M.S

Madhrasathul Ifthithaah Mock Exam - 2011 grade 10Dept. of science .PHYP2


11/15

(iv) calculate the critical angle of the water - air boundary /

(v) Explain how rays h m ishA could ieach9he eye of fishB along two different --paths. Add rays to the diagram to illustrate your 'answer. - -...................t -M ik ' .. i .! .....s.cr!m,,...............................................................................................................................................b.ta.l,... h h ~ .x .. ....................................................................... ..................-.................." . (4)10. Ultrasound may be used to measure the depth of the sea. Fig. 10.1 shows a pulse ofultrasound sent down to the sea bed and the reflected pulse retaming to&e ship. -

-' 7 "%. ,

distance toseabed

(a) Describe what ismeant by ultrasound....MS. .a..L~~zttra'm~..~u~~...~~j.zh.dciy~xna.d~&..wr=;~. .&~n.................&.....a*.&.i?...,...........weds&..?.&W~Y.....4 ............................* ....................... (2)@) Fig. 10.2 is a cathode-ray oscilIoscope (c.r.0.) traceof the pulses of ultrasound sent fiom theship and the reflected pulses.

pulsessenthwnshlp

reflected pulses from unedividonsea bed 0.10sFig. 10.2

.MadKhsathul Ifthithaah Mock Exam - 201 1 .grade 10Dept. of science PHY P2


12/15

The speed of ultrasound in water is 1500 m/s and the wavelength of the ultrasound wave is0.030 m. The time-base settingfbr the x-axis on3hkk.r.o. is 0.10 ddivision.Calculate(i) the frequency of the ultrasound wave.......Y.2....R.d.......................................

0 -080- v .............................&..;...h ............. :...,...lrdo - (2)(ii) the time taken fo; ihs ultrasound pulse to reach the seabed

' (iii) the distance to the seabed

(c) The ship moves to a place where the sea is deeper.(i) State and explain two changes that would occur to the reflected pulses on the c.r.0.

trace. You may give diagrams of the old and new traces to show the changes.b A

\ .b . . . -9 . .* .k%f&~.k .h . .&. ....C A ~ ? J...3 ik . f~..5.k...haw...~ k . . . .3)W tk . PU r h yet"vkd+ ppb+ t - iC ; A M 3du($ %n&e sea is more than 450m deep, he ul ound pu ses must be sent out less. oeco-k.~t&%o h . Using data from Fig. 10.2,explain why this is necessary. ( q c 79tk :1k~r+~d..d.~f.rt?9. ~ . . . c . Q ~ . ! ~ . ~ c ; E ~k?.!.f.f;;;..-$ mt.,~.. .... .... .... ..... ..............Madhrasathul Ifthithaah MockExam - 201 1 grade 10Dept. of science PHYP2


13/15

11.Different energy sources areused to generate electricity.(a)Which two of the energy sources in the box are non- renewable energy sources?

Draw a ring around each of youranswers.

The diagram shows a geothermal power station. Hot rocks in the Earth's crust heat water toproduce steam. The steam is used to drive turbines that turn electrical generators.

Coldwater

1

(b) How is the way in which a geothermal power station generates electricity the same as theway in which a coal burning power station generates efectricity? (1)

..............................................................................................................................................(c)State the energy changes taking place in the generator. (1).........&.E......3 ...E.G..t...........................................................................................................Before the generated power is transmitted to through the long cables, the voltage is increased andthe current is decreased. This is called high voltage power transmission. This is done by a devicecalled transformer.

--.

' Madhrasathul Ifthithaah Mock Exam - 2011 . grade 10Dept. of science PHY P2


14/15

labeled diagram of a transformer which can in the station.

The graph shows how the terhperature of the rocks in the Earth's crust depends on how fhr therocks are below the Earth's surface.

(e) Estimate the temperature of the rocks 5 kilometres below the Earth's surface..Show clearlyhow you have used the graph to get your answer.

I

(2)

'4 'cTemperature=.. .

Madhrasathul Ifhithaah Mock Exam - 20 11 grade 10


15/15

Scientists have estimated that one quarter of the world's electricity could be generated usinggeothermal energy.(f) Give one reason that scientists might use to persuade a government to spend large amounts ofmoney building geothermal power stations. (1).............b.cx;~i~~k...i);..r.s....a...~.I.?.fi.h....%.K~LJ ....... uikcc.~............................... *The picture shows a solar-powered aircraft. The aircraft has no pilot.

(g) Give oneenvironmental advantage of using electric moto& to drive the a i r d ropellersrather than motors that bum a fbel. (1)

...............................................................................................................................................(h) State the energy changes taking place in a solar cell. (1)..................................... .. .. .......................................

On a summer day, 175 000 joules o f energyhe supplied to the aircraft's solar cells everysecond. The usehl energy transferred by the solar cells is 35 000 joules every second.(i) Calculate the eflicienc of the solar cells.dA

Efficiency= .................................//i

~a dkas at hul fthithaah -'I- Mock-Exam-20 11 -/ grade 10Dept. of science PHY P2

mock 2011 paper 2 (ifthithah)

Documents