# Physical Sciences Grade 12 Limpopo Prelim 2024 Memo > Grade 12 Physical Sciences memorandum from the Limpopo Prelim Exam 2024, 16 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/physicalsciencesp1memo202409/2df02342-8686-4674-a0aa-9ab6f9eb6e35 - Updated: 2026-09-27 - Subject: Physical Sciences - Grade: Grade 12 - Document type: Memorandum - Year: 2024 - Exam period: Limpopo Prelim Exam - Curriculum: CAPS - Pages: 16 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Physical Sciences](https://www.hlayiso.com/library/grade-12/physical-sciences) › [Physical Sciences Grade 12 Limpopo Prelim 2024 Memo](https://www.hlayiso.com/library/physicalsciencesp1memo202409/2df02342-8686-4674-a0aa-9ab6f9eb6e35) ## About this document Physical Sciences · Grade 12 · Limpopo Prelim Exam · 2024. Memorandum, 16 pages. Read online or download the PDF. 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Layout, diagrams and tables may not survive extraction. ### Page 1 Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT GRADE 12/GRAAD 12 PHYSICAL SCIENCES: PHYSICS (P1) FISIESE WETENSKAPPE: FISIKA (P1) SEPTEMBER 2024 MARKING GUIDELINES/ NASIENRIGLYNE MARKING GUIDELINES MARKS/PUNTE: 150 These marking guidelines consist of 14 pages./ Hierdie nasienriglyne bestaan uit 14 bladsye. ### Page 2 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 2 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 1/ VRAAG 1 1.1 D  (2) 1.2 A  (2) 1.3 D  (2) 1.4 D  (2) 1.5 C  (2) 1.6 A  (2) 1.7 C  (2) 1.8 A  (2) 1.9 B  (2) 1.10 B  (2) [20] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 3 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 3 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 2/ VRAAG 2 2.1.1 It is a ratio of the magnitude of two forces. (1) Dit is 'n verhouding van die grootte van twee kragte. 2.1.2 A body will remain in its state of rest or motion at constant velocity unless a non-zero resultant/net force acts on it. (2) 'n Liggaam sal in sy toestand van rus of beweging teen ‘n konstante snelheid volhard, tensy 'n nie-nul resulterende/netto krag daarop inwerk 2.1.3 Accepted labels N Normal force/ FN/Fsurface on crate N Normaal krag/FN /F oppervlakte op krat Fk Frictional force /kinetic frictional force/f Wrywingskrag /kinetiese wrywingskrag/f FA Applied force/Fapplied/F ● FA Toegepaste krag/Ftoegepas/F w Fg/mg/weight/gravitational force/ fk FEarth on crate/3333,2 N Fg/mg/gewig/gravitasiekrag/ w Faarde op krat/3333,2 N Notes/Aantekeninge:  Mark is awarded for label and arrow/ Punt word toegeken vir benoeming en pyl.  Do not penalize for length of arrows/ Moenie penaliseer vir lengte van pyle nie  Deduct 1 mark for any additional force/ Trek 1 punt af vir enige bykomende krag (4)  If force(s) do not make contact with dot/body: 3/4/ Indien krag(te) nie kontak maak met kol/voorwerp nie: 3/4  If arrows missing: 3/4 /As pyle ontbreek: 3/4 2.1.4 fk = kN Any one/ Enige een  fk = k (mgcos + FAsin) = 0,25[(34)(9,8)(cos25)+Fsin25°] = 75,495 + 106ꞏF (3) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 4 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 4 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 2.1.5 Fnet = 0 ACCEPT: Fnet = ma Any one/ Enige een  Fcos25° – fk – mgsin25° = 0 Fcos25° – 75,495 – 0,106ꞏF – (34)(9,8)(sin25°) = 0 F(0,800307787) = 216,3114048 F = 270,2853 N (3) 2.2 OPTION 1/OPSIE 1 OPTION 2/OPSIE 1 Fnet = Fg Fnet = Fg GmM GmM ma = ma = r2 r2 GM GM a = r2 a= r2 -11 24 (6,67 x 10 )(5,98 x 10 ) (6,67 x 10-11 )(5,98 x 1024 ) a= 2  a= 2  (6,38 x 106 + 1000 x 103 ) (6,38 x 106 + 1000 x 103 ) a = 7,32 mꞏs-1 towards the Earth/ a = 7,32 mꞏs-1 towards the Earth. . na die Aarde toe. na die Aarde toe aE/A 9,8 = 7,32 w1000 km = mg as = 1,338797814 3 600 = m(7,32) m = 491, 80 kg wE/A = (3 600)( 1,338797814) = 4819,67 N downwards wE/A = mg afwaarts =(491,80)(9,8) = 4819,67 N downwards (4) afwaarts [17] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 5 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 5 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 3/ VRAAG 3 3.1 Motion during which the only force acting on an object is the gravitational force. (2) Beweging waartydens die enigste krag wat op 'n voorwerp inwerk, die gravitasiekrag is. 3.2 9,8 mꞏs-2 downwards/afwaarts (2) 3.3 UPWARDS AS POSITIVE DIRECTION DOWNWARDS AS POSITIVE OPWAARTS AS POSITIEF AFWAARTS AS POSITIEF vf2 = vi2 + 2ay vf2 = vi2 + 2ay = (0)2 + 2(-9,8)(-20)  = (0)2 + 2(+9,8)(+20)  = 392 = 392 vf = -19,799 mꞏs-1 (-14√2 mꞏs-1) vf = 19,799 mꞏs-1 (14√2 mꞏs-1) 3 3 vi = 4 (+14√2) = +14,8492 mꞏs-1 vi = 4 (-14√2)  = -14,8492 mꞏs-1 v f  v i  a t  v f  v i  a t  0 = 14,8492 + (-9,8)∆t 0 = -14,8492 + (9,8)∆t ∆t = 1,51522449 s ∆t = 1,51522449 s (6) ∆tAB = 2(1,51522449)  ∆tAB = 2(1,51522449)  = 3,03045 s = 3,03045 s Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 6 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 6 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 3.4 POSITIVE MARKING FROM QUESTION 3.3 POSITIEWE NASIEN VANAF VRAAG 3.3 Upwards as the positive direction/Opwaarts as positief: 14,8 Velocity/Snelheid (mꞏs-1) 5 0  A P Time/Tyd (s) -19,779 Downwards as the positive direction/Afwaarts as positief: Velocity/Snelheid (mꞏs- 19,779 0  1 A P Time/Tyd (s) ) -14,85 Marking Criteria/ Nasienkriteria Marks/ Punte Straight line graph from 0 to 12,799 or -19,799 mꞏs-1  Reguitlyngrafiek van 0 tot 12 799 of -19 799 mꞏs-1 (3) Times A and P correctly shown  Tyd A en P korrek aangedui Straight line graph starting from A (14,85 or -14,85 mꞏs-1) to P  Reguitlyngrafiek begin by A (14,85 of -14,85 mꞏs-1) tot P [13] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 7 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 7 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 4/ VRAAG 4 4.1 The product of an object’s mass and its velocity.  (2) Die produk van 'n voorwerp se massa en sy snelheid. 4.2 Upwards as positive/ Downwards as positive/ Opwaarts as positief Afwaarts as positief vf2 = vi2 + 2ay vf2 = vi2 + 2ay (0)2 = vi2 + 2(-9,8)(+13,7)  (0)2 = vi2 + 2(9,8)(-13,7)  vi2= 268,52 vi2= 268,52 vi = 16,39 mꞏs-1 vi = 16,39 mꞏs-1 vi = 16,39 mꞏs-1  (upwards) vi = 16,39 mꞏs-1  (upwards) (opwaarts) (opwaarts) (3) 4.3 The total linear momentum of an isolated system remains constant (is conserved).  (2) Die totale lineêre momentum van 'n geïsoleerde sisteem bly konstant (behoue). 4.4 Upwards as positive/ Downwards as positive/ Opwaarts as positief Afwaarts as positief ∑ p i = ∑ pf Any one/ ∑ pi = ∑ pf (m + m)vi = m1V1f + m2V2f Enige een (m + m)vi = m1V1f + m2V2f Any one/ Enige een  (2m)vi = m1V1f + m2V2f  (2m)vi = m1V1f + m2V2f 2m)(-9,2) = (m)(16,39) + mV2f  (2m)(9,2) = (m)(-16,39) + mV2f  (2)(-9,2) = 16,39 + V2f (2)(9,2) = 16,39 + V2f V2f = -18,4 – 16,39 V2f = 34,79 mꞏs-1 V2f = -34,79 mꞏs-1 The velocity is 34,79 mꞏs-1 The velocity is 34,79 mꞏs-1 The magnitude of the velocity is -1 The magnitude of the velocity is 34,79 mꞏs / 34,79 mꞏs-1/ Die snelheid is 34,79mꞏs-1 Die snelheid is 34,79mꞏs-1 Die grootte van die snelheid is Die grootte van die snelheid is 34,79 mꞏs-1 34,79 mꞏs-1 (4) [11] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 8 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 8 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 5/ VRAAG 5 5.1 Non – conservative Nie-konserwatief (1) 5.2 The rate at which work is done. Die tempo waarteen arbeid verrig word. OR/OF: The rate at which energy is expended/transferred./ Die tempo waarteen energie verbruik/oorgedra word. (2) 5.3 OPTION 1/OPSIE 1: W nc = ∆Ek + ∆Ep Any one/ Enige een  W engine/enjin+ W f = ∆Ek + ∆Ep 1 Wengine/enjin + fꞏ∆xꞏcos = 2m(vf2 − vi2 ) + mg(hf – hi)  Wengine/enjin + (3,84x104)(480)(cos180°) = 2(6000)(112 –  1 02) + (6000)(9,8)(0 – 55) W engine/enjin - 18432000 = 363000 – 3234000 W engine/enjin = 15561000 J W P = ∆t 15561000 =  86 = 176829, 5455 W OPTION 2: W nc = ∆Ek + ∆Ep Any one/ Enige een  1 WN + W w + Wfk + W engine/enjin = 2m(vf2 − vi2 ) 1 0 + (mgsin)∆xꞏcos + fk∆xcos + W engine/enjin = 2m(vf2 − vi2 ) 55   1  (6000)(9,8)(480)(480)(cos0°)+(3,84x104)(480)(cos180°)+W engine = 2 (6000)(112–02) 3234000 – 18432000 + W engine/enjin = 363000 W engine/enjin = 15561000 J W P = ∆t 15561000 =  86 = 176829, 5455 W (6) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 9 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 9 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 5.4 fk = 0,35ꞏw = (0,35)(6000)(9,8) = 20580 N W net = ∆Ek Any one/ Enige een  1 =Wfk = 2m(vf2 − vi2 ) 1 (20 580)∆xcos180°= 2 (6000)(11 – 02) 2 (20 580)∆x = -363000 ∆x = 17,6385 m Therefore the bed will stop the truck since 17,6385 m  20 m/ Daarom sal die bedding die vragmotor stop omdat (4) 17,6385 m  20 m [13] QUESTION 6/ VRAAG 6 6.1.1 Marking criteria/Nasienkriteria If any of the underlined key words/phrases in the correct context is omitted deduct 1 mark. Indien enige van die onderstreepte sleutelwoorde/frases in die korrekte konteks weggelaat word, trek 1 punt af. The (apparent) change in frequency (or pitch) of the sound detected by a listener, because the sound source and the listener have different velocities relative to the medium of sound propagation.  (2) Die (skynbare) verandering in frekwensie (of toonhoogte) van die klank waargeneem deur 'n luisteraar, omdat die klankbron en die luisteraar verskillende snelhede relatief tot die medium waarin die klank voortgeplant word, het. OR/OF: An apparent change in observed/detected frequency/pitch/wavelength, as a result of the relative motion between a source and an observer (listener).  'n Skynbare verandering in waargenome/bespeurde frekwensie/toonhoogte/golflengte, as gevolg van die relatiewe beweging tussen 'n bron en 'n waarnemer (luisteraar) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 10 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 10 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 6.1.2 v±v fL = ( v ± vL )fs s 340 fL (approaching/naderend) = (340 − 40,0)(320)  ……= 362,6667 Hz (4) 6.1.3 v = f 340 = (362,6667)   = 0,937 m (3) 6.2 v±v fL = ( v ± vL )fs s 340 − vL 0,9 fs = ( )fs  343 308,7 = 343 – vL vL= 34,3 mꞏs-1 vf2 = vi2 + 2ax (34,3)2 = (0)2 + 2(2,81) x (5) x = 209,34 m [14] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 11 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 11 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 7/ VRAAG 7 7.1.1 The electrostatic force experienced per unit positive charge placed at that point.  (2) Die elektrostatiese krag wat per eenheidpositiewe-lading by daardie punt geplaas, ondervind word. 7.1.2 kQ1 Q2 F= r2 (9 x 109 )Q1 Q2 9 x 10-3  = (0,02)2  (9 x 109 )(2Q1 )(Q2 ) 9 x 10-3 = (0,02)2 Q2 = 1,414 x 10-8 C Q1 = 2(1,414 x 10-8 C) = 2,828 x 10-8 C KQ E = r2  Enet = EQ1 + EQ2 (9 x 109 )(2,828 x 10-8 ) (9 x 109 )(1,414 x 10-8 ) = +   (0,04)2 (0,02)2 = 159075 + 31815 = 477225 NꞏC-1  (EAST/OOS) (7) 7.2.1 The magnitude of the electrostatic force exerted by one stationary point charge (Q1) on another stationary point charge (Q2) is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance (r) between them.  (2) Die grootte van die elektrostatiese krag wat een puntlading (Q1) op 'n ander puntlading (Q2) uitgeoefen , is direk eweredig aan die produk van die groottes van die ladings en omgekeerd eweredig aan die kwadraat van die afstand (r) tussen hulle. 7.2.2 Q n=q e -1,0 x 10-6 =  -1,6 x 10-19 = 6,25 x 10-12 electrons/elektrone (2) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 12 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 12 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 7.2.3 kQ1 Q2 F=  r2 (9 x 109 )Q1 Q2 45,0 = 2  (2,0 x 10-2 ) 2 (45,0) (2,0 x 10-2 ) = (9 x 109)Q2 Q = 1,41421 x 10-6 C ∆Q =Qf – Qi = 1,41421 x 10-6 – 1,0 x 10-6 ∆Q = 4,1421 x 10-6 C Q n=q e Q n = e 4,142 x 10-6 =  1,6 x 10-19 = 2,59 x 1012 electrons/elektrone. (6) [19 QUESTION 8/ VRAAG 8 8.1 The maximum energy provided by a battery per unit charge passing through it.  (2) Die maksimum energie wat 'n battery lewer per eenheidslading wat daardeur vloei. 8.2.1 V2 = 3V1 = 3V V10= 3V – V = 2V IR1 = I10 V 2V = 10  R1 R1 = 5 (3) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 13 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 13 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 8.2.2 A1 = 2A2 IR1 = A2  RP is the same/is dieselfde R2 = R1 + 10 = 5 + 10 = 15 (3) 8.3.1 V2 = 9V 9V V1 = 3 = 3V V10 = 9 – 3 = 6V (3) 8.3.2 V IR2 = R 9 = 15 = 0,60 A Itotal /totaal= 2(0,60)  = 1,2 A = I A1 (3) 8.3.3 Vext = 9 + (1,2)(9)  = 19,8 V Vlost = 20,4 – 19,8 = 0,6 V 0,6 R = 1,2 = 0,50  (3) [17] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 14 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 14 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 9/ VRAAG 9 9.1 AC (generator) the ends of the coil are attached to slip rings (2) WS (generator) die punte van die spoel is aan sleepringe geheg 9.2 From mechanical energy to electrical energy (1) Van meganiese energie tot elektriese energie 9.3.1 Brushes/Borsels (1) 9.3.2 They conduct current from the slip rings to the external circuit. (1) Hulle gelei stroom vanaf die sleepringe na die eksterne stroombaan 9.4 From X to Y/ Van X na Y (1) 9.5.1 O V (1) 9.5.2 The rms current is the alternating current which dissipates/produces the same amount of energy as an equivalent direct current (DC). (2) Die wgk stroom is die wisselstroom wat dieselfde hoeveelheid energie verbruik /oordra as 'n ekwivalente gelykstroom (GS). 9.3 Vmax/maks Vrms/wgk/ =  √2 120 = √2 = 60√2 Pave/gem = Irms/wgkVrms/wgk = (1,2)( 60√2) = 101,8234 W (4) [13] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 15 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 15 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne QUESTION 10/ VRAAG 10 10.1 The process whereby electrons are ejected from a metal surface when light of suitable frequency is incident on that surface.  (2) Die proses waardeur elektrone uit 'n metaaloppervlak vrygestel word wanneer lig van geskikte frekwensie invallend op die oppervlak is. 10.2.1 Intensity (of light) /Intensiteit (van lig)  (1) 10.2.2 Type of light/wavelength/frequency /Tipe lig/golflengte/frekwensie (1) 10.2.3 What is the relationship between the intensity of light and the current strength (of the cell)?  Wat is die verband tussen die intensiteit van lig en die stroomsterkte (van die sel)? OR/OF: How will the intensity of light influence the current strength of the (2) cell?  Hoe sal die intensiteit van lig die stroomsterkte van die sel beïnvloed? OR/OF: What influence does the intensity of blue light have on the current strength (of a cell)?  Watter invloed het die intensiteit van blou lig op die stroomsterkte (van 'n sel)? 10.3 Greater intensity means/ Groter intensiteit beteken:  More photons irradiate (strikes) the metal surface per unit time.  Meer fotone bestraal (slaan) die metaaloppervlak per tydseenheid. (2)  More photoelectrons are emitted/ejected/dislodge per unit time.  Meer foto-elektrone word per tydseenheid vrygestel.  Higher rate of flow of electric charge. Hoër tempo van vloei van elektriese lading. . Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief ### Page 16 Downloaded from hlayiso.com Physical Sciences P1/Fisiese WetenskappeV1 16 Limpopo DoE/September 2024 Marking Guidelines/Nasienriglyne 10.4 E = W  + Ek(max/maks) hf = W + Ek(max/maks) Any one/ Enige een  hc = W  + Ek(max/maks)  (6,63 x 10-34 )(3 x 108 ) =  (470 x 10-9 ) = 2,35 x 10-19 J + Ek(max/maks) -19  Ek(max/maks) = 1,882 x 10 J (3) 10.5 When the frequency of the radiation is less than the threshold frequency of the metal no electrons are emitted. The energy is absorbed and causes the electrons within the metal to jump to higher energy levels. When they drop down again they emit energy in the form of light.  Wanneer die frekwensie van die straling minder is as die drempelfrekwensie van die metaal, word geen elektrone vrygestel nie. Die energie word geabsorbeer en veroorsaak dat die elektrone binne die metaal, na hoër energievlakke spring. Wanneer hulle weer afsak, straal hulle energie, in die vorm van lig uit. 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