Physical Sciences Grade 10 P1 2020 Memo (Eng)

NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 10 NOVEMBER 2020 PHYSICAL SCIENCES (PHYSICS) P1/ FISIESE WETENSKAPPE (FISIKA) V1 MARKING GUIDELINE/NASIENRIGLYN (EXEMPLAR/EKSEMPLAAR) MARKS/PUNTE: 150 This marking guideline consists of 12 pages./ Hierdie nasienriglyn bestaan uit 12 bladsye.

2 PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 (EC/NOVEMBER 2020) QUESTION 1/VRAAG 1 1.1 A ✓✓ (2) 1.2 D ✓✓ (2) 1.3 C ✓✓ (2) 1.4 B ✓✓ (2) 1.5 C ✓✓ (2) 1.6 C ✓✓ (2) 1.7 D ✓✓ (2) 1.8 A ✓✓ (2) 1.9 C ✓✓ (2) 1.10 C ✓✓ (2) [20] QUESTION 2/VRAAG 2 2.1.1 The total distance travelled divided by total time ✓✓ Die totale afstand afgelê gedeel deur die totale tyd. (2) 2.1.2 v = ∆x/∆t ✓ = (500 + 800)/1 800 ✓ = 0,72 m.s-1 ✓ (3) 2.1.3 500 m ✓ 800 m ✓ 1300 m ✓ (3) 2.1.4 v = ∆x/∆t ✓ 0,72 ✓ = (500 + 500 + 1 300)/∆t ✓ ∆t = 3 194,44 s ✓ (4) 2.2.1 Distance/Afstand = ½ x 2πr ✓= ½ 2 x π x 25 = 78,57 m ✓✓ (3) 2.2.2 Displacement/Verplasing = 2 x radius = 50 m ✓ East/Oos ✓ (2) [17] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/NOVEMBER 2020) PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 3 QUESTION 3/VRAAG 3 3.1 The rate of change of velocity ✓✓ Die tempo van verandering van snelheid (2) 3.2 54 km.h-1 = ✓✓ = 15 m.s-1 ✓ (3) 3.3 vf =vi + a∆t ✓ 20 ✓ = 0 + 2t ✓ ∆t = 10 s ✓ (4) 3.4 Police car / polisiemotor: ∆x = vi∆t + ½ at2 ✓ = (0)(10) + ½ (2)(10)2 ✓ ∆x = 100 m ✓ Van/ bakkie: ∆x = vi∆t + ½ at2 = (15)(10) + ½ (0)(10)2 ✓ ∆x = 150 m ✓ The van is ahead/Die bakkie is voor. ✓ (6) [15] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

4 PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 (EC/NOVEMBER 2020) QUESTION 4/VRAAG 4 4.1.1 5 m.s-1 ✓ EAST / OOS ✓ (2) 4.1.2 8.4 m.s-1 ✓✓ (Accept 8,2 to 8,6 m.s-1) (2) 4.2 4.2.1 The velocity is uniformly increasing / Die snelheid verhoog eenvormig ✓ Positive acceleration/ Positiewe versnelling ✓ (2) 4.2.2 Constant velocity/ Konstante snelheid ✓✓ OR/ OF acceleration is equal to zero / Versnelling is gelyk aan nul No acceleration / Geen versnelling (2) 4.3 4.3.1 Distance A to C / Afstand vanaf A na C. ∆x = (l x b) + (1/2 bh) ✓ ∆x = (5 x 350)✓ + (1/2 x 150 x 5) ✓ ∆x = 2 125 m ✓ (4) 4.3.2 a = (vf – vi)/∆t = (0 – 10)/50 ✓✓ = -0,2 ✓ a= 0,2 m.s-2 west / wes ✓ (4) 4.4 Gradient/slope is the steepest / Gradiënt/helling is die steilste. ✓✓ (2) [18] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/NOVEMBER 2020) PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 5 QUESTION 5/VRAAG 5 5.1 The total mechanical energy in an isolated system is constant ✓✓ Die totale meganiese energie in ʼn geïsoleerde sisteem bly konstant. (2) 5.2 0 (J) ✓ (2) 5.3 490 (J) ✓ 5.4 Ep = mgh ✓ = 5 x 9,8 x 6 ✓ = 294 J ✓ (3) 5.2.2 (1/2 mv2 + mgh)A = (1/2 mv2 + mgh)D ✓ 490✓ = ½ (5)v2 ✓ + (5)(9,8)(10) ✓ v=0✓ The ball will reach point D / Die bal sal punt D bereik. ✓ (5) [12] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

6 PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 (EC/NOVEMBER 2020) QUESTION 6/VRAAG 6 6.1.1 f = 1/T ✓ = 1/0,2 ✓ = 5 Hz ✓ (3) 6.1.2 v = fλ ✓ = 5 ✓ x 3/2 ✓ = 7,5 m.s-1 ✓ (4) 6.1.3 a and / en d ✓ b and / en f ✓ (2) 6.1.4 Amplitude = 30/2 = 15 m ✓✓ (2) 6.2.1 Pulse – single disturbance in a medium ✓✓ Puls – Enkele versteuring in ʼn medium (2) 6.2.2 Destructive interference ✓ Destruktiewe interferensie (1) 6.2.3 0.6 cm ✓ ✓ (2) [16] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/NOVEMBER 2020) PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 7 QUESTION 7/VRAAG 7 7.1.1 A: rarefaction / verdunning ✓ B: compression / verdigting ✓ C: wavelength / golflengte ✓ (3) 7.1.2 Yes/ Ja ✓ (1) 7.2.1 B✓ Higher frequency / Hoër frekwensie ✓✓ (3) 7.2.2 A✓ (1) [8] QUESTION 8 / VRAAG 8 8.1 It has both wave-like characteristics /Dit het beide golfagtige eienskappe ✓ and particle-like characteristics / en deeltjie-agtige eienskappe ✓ (2) 8.2 Infrared, visible light, x-ray, gamma rays ✓✓ Infrarooi, sigbare lig, x-straal, gamma-straling (2) 8.3 A particle of light energy ✓✓ ʼn Deeltjie van ligenergie (2) 8.4 c=fxλ✓ 3 x 108✓ = f (0,025 x 10-9) ✓ f= 1,2 x 1019 Hz E= hf ✓ E= (6,63 x 10-34) (1,2 x 1019) ✓ E= 7,95 x 10-15 J ✓ (6) [12] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

8 PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 (EC/NOVEMBER 2020) QUESTION 9/VRAAG 9 9.1 Is a region in space where magnetic substance can experience a force ✓✓ Is ʼn gebied in ruimte waar magnetiese stof ʼn krag kan ervaar. (2) 9.2 Shape / Vorm √√ Direction / Rigting √ (3) 9.3 No / Nee ✓ (1) [6] QUESTION 10/VRAAG 10 10.1.1 Less than / Minder as ✓ (1) 10.1.2 n = Q / qe 1013 ✓ = Q /-1,6 x 10 -19 ✓ Q = -1,6 x 10 -6 C ✓ ✓ Q new = -1,6 x 10 -19 + 2 x 10 -19 = 4 x 10 -18C (4) 10.2.1 The net charge of an isolated system remains constant. ✓✓ Die netto lading van ʼn geïsoleerde sisteem bly konstant. (2) 10.2.2 Qb = Qc = Qnet /2 ✓ = (-2 x 10-9 + 2 x 10-9)/2 ✓ = -2 x 10-9 C ✓ n = ∆Q/qe = (-2 x 10-9 + 6 x 10-9)/1.6 x 10-19) ✓✓ = 2,5 x 1010 electrons / elektrone ✓ (6) [13] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/NOVEMBER 2020) PHYSICAL SCIENCES P1/FISIESE WETENSKAPPE V1 9 QUESTION 11/VRAAG 11 11.1 The energy transferred per unit charge ✓✓ Die energie per eenheid-lading oorgedra (2) 11.2.1 1/Rp = 1/R1 + 1/R2 ✓ 1/Rp = 1/6 + 1/12 ✓ Rp = 4 Ω ✓ OR/OF Rp = R1.R2/(R1 + R2) = 6 x 12/(6 + 12) =4Ω (3) 11.2.2 I = 2/3 x 0,9 = 0,6 A ✓ I = Q/Δt ✓ 0,6 ✓ = Q/40 ✓ Q = 2,4 C ✓ (5) 11.2.3 SAME AS / DIESELFDE AS ✓ (1) 11.2.4 DECREASES / NEEM AF Total resistance decreases / Totaal weerstand neem af (2) [13] TOTAL/ TOTAAL: 150 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief