Technical Sciences Grade 12 P1 Eastern Cape June 2023 Memo

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 JUNE/JUNIE 2023 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 MARKING GUIDELINE/NASIENRIGLYN MARKS/PUNTE: 150 This marking guideline consists of pages 11./ Hierdie nasienriglyn bestaan uit 11 bladsye.

Downloaded from hlayiso.com 2 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 (EC/JUNE 2023) QUESTION/VRAAG 1 1.1 B ✓✓ 1.2 A ✓✓ 1.3 A ✓✓ 1.4 C ✓✓ 1.5 B ✓✓ 1.6 D ✓✓ 1.7 A ✓✓ 1.8 B ✓✓ 1.9 B ✓✓ 1.10 A ✓✓ (10 x 2) [20] QUESTION/VRAAG 2 2.1 The rate of change in velocity. ✓✓ (2) 2.2.1 Choose right as postive/Kies regs as positief Learner A/Leerder A: Fnet = ma Fnet = Fa cos 𝜃 + F𝑓 Any one ✓ Fnet = −8 cos 60° + 0,3 ✓✓ Fnet = − 3,7 N Fnet = 3,7 N ✓ to the right/na regs ✓ OR/OF Choose left as positive/Kies links as positief Fnet = ma Fnet = Fa cos 𝜃 + F𝑓 Any one ✓ Fnet = 8 cos 60° + (−0,3) ✓✓ Fnet = 3,7 N ✓ to the right/na regs ✓ (5) 2.2.2 Fnet = ma ✓ 3,7 = 12a ✓ a = 0,31 m. s−2 ✓ (3) 2.2.3 Newton’s Second Law/Newton se Tweede Wet ✓✓ (2) Copyright reserved / Kopieregvoorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/JUNE 2023) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 3 2.2.4 When the net force is exerted on an object with mass m, ✓ the object will accelerate in the direction of the net force. ✓ Indien ʼn netto krag op voorwerp met massa m uitgeoefen word, ✓ versnel die voorwerp in die rigting van die netto krag. ✓ (2) 2.2.5 FN FN FA FA V Ff FA Ff OR/OF h Fg Fg Marking criteria/Nasienkriteria Labels Marks/ /Byskrifte Punte Correct direction and label of Normal force N/FN 1 Korrekte rigting en byskrif van Normale krag Correct direction and label of gravitational force Fg/w 1 Korrekte rigting en byskrif van gravitasiekrag Correct direction and label of frictional force Korrekte rigting en byskrif van die Ff/f 1 wrywingskrag Correct direction and label of the applied force by F/FT/FA 1 Korrekte rigting en byskrif van die toegepaste krag (4) 2.3.1 INCREASE / VERHOOG ✓ (1) 2.3.2 DECREASE / VERLAAG ✓ (1) [20] Copyright reserved/Kopieregvoorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 4 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 (EC/JUNE 2023) QUESTION/VRAAG 3 3.1 3.1.1 When object A exerts a force on object B, ✓ object B simultaneously exerts an oppositely directed force of equal magnitude on object A ✓ Wanneer voorwerp A ʼn krag uitoefen op voorwerp B, ✓ sal voorwerp B gelyktydig ʼn gelyke maar teenoorgestelde krag op voorwerp A indien. ✓ (2) 3.1.2 For crate B/vir Krat B (Let right be + / Regs is +) 𝐹𝑛𝑒𝑡 = 𝑚𝑎 𝐹𝑛𝑒𝑡 = 𝐹𝐴𝑜𝑛𝐵 − 𝐹𝑓𝑘 Any one/ 𝐹𝐴𝑜𝑛𝐵 − 𝐹𝑓𝑘 = 𝑚𝑎 Enige een 𝐹𝐴𝑜𝑛𝐵 − 𝐹𝑓𝑘 = 𝑚𝑎 ✓ 𝐹𝐴𝑜𝑛𝐵 − 25, 3 ✓ = 30 × 2,3 ✓ 𝐹𝐴𝑜𝑛𝐵 = 94,3 𝑁 𝐹𝐵𝑜𝑛𝐴 = −𝐹𝐴𝑜𝑛𝐵 Any one ✓/Enige een 𝐹𝐵𝑜𝑛𝐴 = −94,3 𝑁 𝐹𝐵𝑜𝑛𝐴 = 94,3 𝑁 ✓ 𝑙𝑒𝑓𝑡/𝑙𝑖𝑛𝑘𝑠 ✓ OR/OF (Let left be + / Links is +) 𝐹𝑛𝑒𝑡 = 𝑚𝑎 𝐹𝑛𝑒𝑡 = − 𝐹𝐴𝑜𝑛𝐵 + 𝐹𝑓𝑘 Any one / − 𝐹𝐴𝑜𝑛𝐵 + 𝐹𝑓𝑘 = 𝑚𝑎 Enige een − 𝐹𝐴𝑜𝑛𝐵 + 𝐹𝑓𝑘 = 𝑚𝑎 − 𝐹𝐴𝑜𝑛𝐵 + 25, 3 ✓ = 30 × (−2,3)✓ 𝐹𝐴𝑜𝑛𝐵 = 94,3 𝑁 −𝐹𝐵𝑜𝑛𝐴 = 𝐹𝐴𝑜𝑛𝐵 Any one ✓/Enige een −𝐹𝐵𝑜𝑛𝐴 = 94,3 𝑁 𝐹𝐵𝑜𝑛𝐴 = 94,3 𝑁 ✓ left/links ✓ (6) [8] Copyright reserved / Kopieregvoorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/JUNE 2023) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 5 QUESTION/VRAAG 4 4.1 4.1.1 Impulse is the product of the net force acting on an object, ✓ and the time the force acts on the object.✓ Impuls is die produk van die netto krag wat op ʼn voorwerp inwerk, ✓ en die tyd wat die netto krag op die voorwerp inwerk. ✓ (2) 4.1.2 OPTION 1/OPSIE 1 Towards the batsman + / In die rigting van kolwer + ∆𝑝 = 𝑚 𝑣𝑓 − 𝑣𝑖 ✓ ∆𝑝 = (0,175) (−30 − 12) ✓ ∆𝑝 = −7,35 𝑁 ∙ 𝑠 ✓ ∆𝑝 = 7,35 𝑁 ∙ 𝑠 ✓ 𝑎𝑤𝑎𝑦 𝑓𝑟𝑜𝑚 𝑡ℎ𝑒 𝑏𝑎𝑡𝑠𝑚𝑎𝑛 / weg vanaf kolwer ✓ OPTION 2/OPSIE Towards the batsman - / in die rigting van die kolwer – ∆𝑝 = 𝑚 𝑣𝑓 − 𝑣𝑖 ✓ ∆𝑝 = (0,175) (30 – ( −12) ✓ ∆𝑝 = 7,35 𝑁 ∙ 𝑠 ✓ ∆𝑝 = 7,35 𝑁 ∙ 𝑠 ✓ 𝑎𝑤𝑎𝑦 𝑓𝑟𝑜𝑚 𝑡ℎ𝑒 𝑏𝑎𝑡𝑠𝑚𝑎𝑛/weg vanaf die kolwer ✓ (5) 4.1.3 POSITIVE MARKING FROM 4.1.2/ POSITIEWE MERK VAN 4.1.2 𝐹𝑛𝑒𝑡 ∆𝑡 = ∆𝑝 ✓ 𝐹𝑛𝑒𝑡 (0,05) = 7,35 ✓ 𝐹𝑛𝑒𝑡 = 147 𝑁 ✓ OR/OF 𝐹𝑛𝑒𝑡 ∆𝑡 = ∆𝑝 ✓ 𝐹𝑛𝑒𝑡 (0,05) = −7,35 ✓ 𝐹𝑛𝑒𝑡 = −147 𝑁 ✓ (3) 4.1.4 ∆𝑝 From 𝐹𝑛𝑒𝑡 = ∆𝑡 ✓ • 𝐹𝑛𝑒𝑡 ∝ ∆𝑝 if Δp is constant/ ✓ • crumple zones increase the time ✓ • Fnet decreases. ✓ • 𝐹𝑛𝑒𝑡 ∝ ∆𝑝 as Δp konstant is. ✓ • vermeerder tyd a.g.v. frommelsones ✓ • Fnet verminder ✓ (4) Copyright reserved/Kopieregvoorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 6 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 (EC/JUNE 2023) 4.2 4.2.1 The total linear momentum of an isolated system remains constant (in magnitude and direction). (✓✓) Die totale lineêre momentum van ʼn geïsoleerde sisteem bly konstant/word behou (in grootte en rigting). (✓✓) (2) 4.2.2 OPTION 1 Right + / OPSIE 1 Regs + ∑ 𝑝𝑏𝑒𝑓𝑜𝑟𝑒 = ∑ 𝑝𝑎𝑓𝑡𝑒𝑟 ✓ 𝑚1𝑣1𝑖 + 𝑚2𝑣2𝑖 = 𝑚1𝑣1𝑓 + 𝑚2𝑣2𝑓 (2)(3) + (3,5)(0) ✓ = (2)(−1) + 3,5𝑣 ✓ 𝑣 = 2,29 𝑚 ∙ 𝑠−1 ✓ 𝑣 = 2,29 𝑚 ∙ 𝑠−1; 𝑟𝑖𝑔ℎ𝑡/𝑟𝑒𝑔𝑠 ✓ OPTION 2 Left + / OPSIE 1 Links + ∑ 𝑝𝑏𝑒𝑓𝑜𝑟𝑒 = ∑ 𝑝𝑎𝑓𝑡𝑒𝑟 ✓ 𝑚1𝑣1𝑖 + 𝑚2𝑣2𝑖 = 𝑚1𝑣1𝑓 + 𝑚2𝑣2𝑓 (2)(−3) + (3,5)(0) ✓ = (2)(1) + 3,5𝑣 ✓ 𝑣 = −2,29 𝑚 ∙ 𝑠−1 ✓ 𝑣 = 2,29 𝑚 ∙ 𝑠−1; 𝑟𝑖𝑔ℎ𝑡/𝑟𝑒𝑔𝑠 ✓ (5) [21] Copyright reserved / Kopieregvoorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/JUNE 2023) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 7 QUESTION/VRAAG 5 5.1 Work done is the product of the applied force on an object and the displacement in the direction of the force. ✓✓ Die arbeid verrig is die produk van die toegepaste krag op die voorwerp en die verplasing in die rigting van die krag. ✓✓ (2) 5.2.1 𝐹𝑓 = 𝜇𝑘 𝐹𝑁 ✓ 𝐹𝑓 = (0,14)(9,8)(8) ✓ 𝐹𝑓 = 10,976 𝑁 ✓ (3) 5.2.2 𝑊𝑓 = 𝐹𝑓 ∆𝑥𝑐𝑜𝑠∅ ✓ 𝑊𝑓 = (10,976)(4) cos 0° ✓ 𝑊𝑓 = 43,904 𝐽 ✓ (3) 5.3 0J✓ (1) 5.4 5.4.1 Power is the rate at which work is done or expended. ✓✓ Drywing is die tempo waarteen arbeid verrig word of energie gebruik word. (2) 5.4.2 𝑊 𝑃 = ∆𝑡 ✓ 480 000 𝑃= ✓ 30 𝑃 = 16 000 𝑊 ✓ 16 000 ℎ𝑝 = ✓ 746 ℎ𝑝 = 21,45 ℎ𝑝 ✓ (5) [16] QUESTION/VRAAG 6 6.1 Total mechanical energy remains constant in an isolated system. ✓✓ Die totale meganiese energie in ʼn geïsoleerde sisteem bly konstant. (2) 6.2 ME = EK + Ep ✓ = ½ mv2 + mgh = ½ (2,5)(0)2 ✓+ (2,5)(9,8)(10) ✓ = 245 J ✓ (4) 6.3 6.3.1 No / Nee ✓ (1) 6.3.2 The force applied and the direction of motion are perpendicular to each other, ✓ so no work is done on the object. ✓ Die toegepaste krag en die rigting van beweging is loodreg op mekaar, ✓ so geen arbeid word op die voorwerp verrig nie. ✓ (2) [9] Copyright reserved/Kopieregvoorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 8 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 (EC/JUNE 2023) QUESTION/VRAAG 7 7.1 Strain is the ratio of change in the dimension/length of objects to the original dimension/length ✓✓ Rekking is die verhouding van verandering in dimensie/lengte van voorwerpe tot die oorspronklike dimensie/lengte. ✓✓ Accept/aanvaar The change in length over the original length of an object. ✓✓ Die verandering in lengte van die voorwerp tot die oorspronklike lengte van ʼn voorwerp. ✓✓ (2) 7.2 Hooke’s law states that, within the limit of elasticity, stress is directly proportional to the strain. ✓✓ Hooke se wet bepaal dat spanning, in die grens van elastisiteit, direk eweredig aan die rekking is. ✓✓ (2) 7.3 7.3.1 𝐹 𝛿 = 𝐴✓ 𝐹 1 × 106 ✓ = 2×10−3 ✓ 𝐹 = 2 000 𝑁 / 2 𝑘𝑁 ✓ (4) 7.3.2 ∆𝐿 𝜀= ✓ 𝐿 1×10−3 𝜀= ✓ 50 𝜀 = 2 × 10−5 ✓ NOTE: Penalise if units are included (final answer). LET WEL: Penaliseer indien eenhede by finale antwoord gegee is. (3) 7.3.3 𝛿 𝐾= 𝜀✓ 1×106 𝐾 = 2×10−5 ✓ 𝑚−2 𝐾 = 5 × 1010 𝑁 𝑃𝑎 ✓ (3) [14] Copyright reserved / Kopieregvoorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/JUNE 2023) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 9 QUESTION/VRAAG 8 8.1 Viscosity is a physical property of fluids. It shows the resistance to flow. ✓✓ Viskositeit is ʼn fisiese eienskap van vloeistowwe. Dit toon die weerstand teen vloei. (Viskositeit is ʼn fisiese eienskap van vloeistof om die relatiewe beweging tussen twee aangrensende vlakke teen te werk.) (2) 8.2 5W-30 SAE is the oil that behaves as an SAE 5 oil at low temperatures, ✓ and behaves as an SAE 30 at high temperatures.✓ 5W-30 SAE is die olie wat as ʼn SAE 5 olie by lae temperature werk ✓ en sy gedrag by hoë temperature is soos ʼn SAE 30 olie. ✓ OR/OF 5: Viscosity grade at cold temperature, W: Winter 30: Viscosity rate at 100 °C 5: Viskositeit grade by kouer temperatuur, W: Winter 30: Viskositeit by 100 °C. (2) 8.3 B ✓✓ (2) 8.4 In summer South Africa has high temperature; B has a higher viscosity ✓ at higher temperatures. ✓ In die somer is Suid-Afrika se temperatuur hoog; B het ʼn hoër viskositeit ✓ by hoër temperature. ✓ (2) 8.5 Single/mono-grade oil is graded at one temperature, ✓✓ while multigrade oil is graded at two temperatures. ✓✓ Enkel/mono-graad olie word gegradeer by een temperatuur, ✓✓ terwyl multigraad by twee temperature gegradeer word. ✓✓ OR/OF • Single /Monograde oil is the engine oil that is designed to function at either low temperatures or high temperatures and is not be suitable for engines with changing temperatures. For example, SAE 40 oil is a monograde oil. ✓✓ • Enkel/monograad olie is die enjin-olie wat ontwerp is om te funksioneer by of lae temperature of hoë temperature en is nie geskik vir enjintemperature wat baie verander nie. ✓✓ • Multi-grade oil is an engine oil that is designed to cope with the increasing engine temperatures. It behaves as a low viscosity oil at lower temperatures and as a high viscosity oil at high temperatures. For example, 20W50 SAE is an engine oil that behaves as SAE 20 when the engine is cold, and as a SAE 50 when the engine heats up. ✓✓ Multigraad-olie is ʼn enjin-olie wat ontwerp is om met die toenemende enjin- temperature te werk. Dit tree op as ʼn lae viskositeit olie by lae temperature en as ʼn hoë viskositeit olie by hoë temperature. Byvoorbeeld, 20W50 SAE is ʼn olie wat as SAE 20 werk wanneer die enjin koud is, en as ʼn SAE 50 wanneer die enjin opgewarm is. (4) [12] Copyright reserved/Kopieregvoorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 10 TECHNICAL SCIENCES P1/TEGNIESE WETENSKAPPE V1 (EC/JUNE 2023) QUESTION/VRAAG 9 9.1 Hydraulics is a field in applied sciences and engineering ✓ dealing with mechanical properties of liquids. ✓ Hidroulika is ʼn studieveld in toegepaste wetenskappe en ingenieurswese ✓ wat die meganiese eienskappe van vloeistowwe behandel. ✓ OR/OF The study of mechanical properties of liquids. ✓ (1 mark if this definition is given.) Die studie van meganiese eienskappe van vloeistowwe. ✓ (1 punt indien hierdie definisie gegee word.) (2) 9.2 (Any 2/Enige 2) ✓✓ Designing hydraulic systems, steering systems, brake systems, power assisted steering, etc. ✓ Ontwerp van hidrouliese-stelsels, stuurstelsels, remstelsels, kragstuurstelsels, ens. ✓ Presses: metal presses, wood presses, ceramic presses, plastic presses, etc. ✓ Pers/Drukke: Metaalperse, houtperse, keramiekperse, plastiekperse, ens. ✓ Machines for industries: metal, wood, textile, paper, etc. ✓ Masjiene vir industrieë: Metaal, hout, tekstiel, papier, ens. ✓ Processing machinery: wood processing, sheet metal processing, etc. ✓ Verwerkingsmasjinerie: Houtverwerking, bladmetaal-verwerking, ens.. ✓ Casting: foaming, blowing, extruding machines, etc. ✓ Gieting: Skuim, blaas, ekstrudeer(onttrekkings)masjiene, ens. Component finishes: circular tables, revolving distributors, clamping systems, etc. ✓ Komponent afrondings: ronde tafels, wentelende verspreiders, vasklampstelsels (saampers), ens. ✓ (2) 9.3.1 Pressure at a particular point as the thrust(force) acting on the unit area around that point ✓✓ Druk (in ʼn vloeistof) by ʼn spesifieke punt is die stukrag(krag) op die eenheidsoppervlakte rondom daardie punt is. (2) 9.3.2 𝐹 𝑃 = 𝐴✓ 𝐹 1,2 × 105 = 8,4 × 10−3✓ 𝐹 = 1 008 𝑁✓ (3) 9.3.3 Perpendicular to the diver/Loodreg op die duiker ✓ (1) 9.4 𝐹𝑠 𝐹 = 𝐴1 ✓ 𝐴𝑠 1 130 𝐹 1 0,002 = 0,025 ✓ 𝐹 = 1,625 × 103 𝑁 ✓ (3) [13] Copyright reserved / Kopieregvoorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/JUNE 2023) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 11 QUESTION/VRAAG 10 10.1 10.1.1 Refraction/Refraksie (Breking) ✓ (1) 10.1.2 Critical angle/Kritiese hoek ✓ (1) 10.1.3 Total Internal Reflection/Totale Interne Weeerkaatsing ✓ (1) 10.1.4 When light is approaching the less dense medium from the more dense medium ✓✓ Wanneer die lig vanaf ʼn minder digte medium in ʼn meer digte medium beweeg. ✓✓ If the incidence angle is larger than the critical angle. ✓✓ Indien die invalshoek groter as die kritiese hoek is. ✓✓ (4) 10.1.5 (Any 3/enige 3) ✓✓✓ • Fibre optic cables in telecommunications/Optiese veselkabels in telekommunikasie. • Medical applications/Mediese toepassings • Decoration/Versiering • Data transmission/Data oordrag • Providing internet facilities to entire world/Verskaf internetfasiliteite aan die hele wêreld. (3) 10.2.1 99,5 MHz = 99,5 x 106 (Hz) ✓✓ (2) 10.2.2 POSITIVE MARKING FROM 10.2.1/POSITIEWE NASIEN VANAF 10.2.1 𝑐 = 𝑓𝜆✓ 3 × 108 = 99,5 × 106𝜆✓ 𝜆 = 3,01 𝑚 ✓ (3) 10.2.3 Shorter/Korter ✓ NEGATIVE MARKING/NEGATIEWE NASIEN From • ✓ if c is the same/as c dieselfde is ✓ • f108 > f99,5 ✓ (4) [17] TOTAL/TOTAAL: 150 Copyright reserved/Kopieregvoorbehou Please turn over/Blaai om asseblief