# Physical Sciences Grade 12 P1 Eastern Cape Mock 2021 QP

> Grade 12 Physical Sciences Paper 1 question paper from the Eastern Cape Mock Exam 2021, 19 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/physical-sciences-p1-qp-sept-2021-xhosa/c821642c-f4dd-4c3b-9c2e-a43297deb7cd
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 12
- Document type: Question paper
- Year: 2021
- Exam period: Eastern Cape Mock Exam
- Paper: 1
- Curriculum: CAPS
- Pages: 19

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Physical Sciences · Grade 12 · Eastern Cape Mock Exam · 2021. Question paper, 19 pages. Read online or download the PDF.

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                               NATIONAL
                          SENIOR CERTIFICATE

                                 IBANGA 12

                            SEPTEMBA 2021

                           IINZULULWAZ1 P1

AMANQAKU:    150

IXESHA:      3 iiyure

          Eli phepha lemibuzo linamaphepha ali 19 kunye nee datha shithi ezi 3.

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2                                IINZULULWAZI P1                         (EC/SEPTEMBA 2021)

IMIQATHANGO/IMIYALELO NOLWAZI

1.      Bhala IGAMA neFANI         kwizithuba    ezifanelekileyo   kwi   NCWADI
        YEEMPENDULO.

2.      Eli phepha liqulethe imibuzo ELISHUMI. Phendula YONKE imibuzo kweli
        phepha.

3.      Qala umbuzo ngamnye KWIPHEPHA ELITSHA KWINCWADI YAKHO
        YEEMPENDULO.

4.      Nambarisha iimpendulo zakho NGOKUTHE NGQO ngendlela imibuzo
        enamabarishwe ngayo.

5.      Shiya umgca phakathi kwemibuzwana umzekelo: UMBUZWANA 2.1 no
        MBUZWANA 2.2.

6.      Uvumelekile ukusebenzisa ikhalthyuleytha engafakwanga lwazi.

7.      Ungazisebenzisa izixhobo zeMathematika ezifanelekileyo.

8.      Bonakalisa ZONKE iifomyula nee sabstityushini kwizibalo zakho ZONKE.

9.      Shiya impendulo yakho YOKUGQIBELA yamanani yezibalo kubuncinane
        bee desimali pleysi EZIMBINI.

10.     Xhasa okanye unike iingxoxwana apho zifuneka khona.

11.     Uyacetyiswa ukuba uyisebenzise IIDATHA SHITHI ezikweli phepha.

12.     Bhala ngokucocekileyo nangokucacileyo.

Ushicilelo luselugcinweni                                                          Tyhila

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(EC/SEPTEMBA 2021)                   IINZULULWAZI P1                                               3

UMBUZO 1: UXUBO-KHETHO MIBUZO

Unikwe iimpendulo ezahlukeneyo kule mibuzo ilandelayo. Khetha impendulo
echanekileyo uze ubhale kuphela unobumba (A–D) ecaleni kwenombolo
yombuzo (1.1–1.10) KWINCWADI YAKHO YEMPENDULO, umzekelo: 1.11 E.

1.1     I imphalsi eyenziwe yinethi fosi esebenza kwi objekhthi ilingana ne/no …

        A     momentam yokuqala ye objekhthi.

        B     momentam yokugqibela ye objekhthi.

        C     kutshintsha momentam ye objekhthi.

        D     reyithi yokutshintsha kwemomentam ye objekhthi                                     (2)

1.2     Igrafu engezantsi ibonisa unxulumano phakathi kwenethi fosi esetyenziswe
        kwi objekhthi kunye ne displeysimenti eyihambileyo. Inethi fosi ne
        displeysimenti ziya cala nye.

         SESIPHI isiqwengana kwezi zilandela esiboniswa yigrafu?

         A       I eriya phakathi kwegrafu nedispleysimenti eksisi imele inethi work
                 done eyenziwe yifosi.

         B       I eriya phakathi kwegrafu nedispleysimenti eksisi imele ipower
                 ekhutshwe yifosi.

         C       Igradiyenti yegrafu imele utshintsho kwi kinetic eneji ye objekhthi.

         D       Igradiyenti yegrafu imele work done ye objekhthi.                               (2)

Ushicilelo luselugcinweni                                                               Tyhila

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  4                                       IINZULULWAZI P1                   (EC/SEPTEMBA 2021)

 1.3 Umzobo ongezantsi ubonisa zonke iifosi ezisebenza kwiobjekhthi etsalelwa
     ngasekunene yifosi u F esebenza kwi engile u θ ngakuhorizontali.
                                       N                    F

                                                           θ

                                 fk

                                                w

      Yeyiphi indlela yokubeka kwezi zilandelayo engasetyenziswa ukufumana
      ubungakanani be khayinethikh frikhshinal fosi (fk) esebenza kwi obhjekhthi?

      A    µ(w + Fsinθ)

      B    µ(w – Fsinθ)

      C    µ(N – w)

      D    µw                                                                              (2)

1.4 Igrafu ye posishin thayim engezantsi imele ukuhamba kwebhola ukusuka
    ekukhululweni ngexesha imile kumphakamo othile ngasentla komgangatho
    yabetha yabuya ukusuka kumgangatho amatyeli ngamatyeli. Ungayinanzi
    iresistensi yomoya.

            Ipozishinin (m)
                                      P             R

                                                           S
                                          Q
                                              Ixesha (s)

      Yeyiphi ipoyinti (P, Q, R okanye S) kwi grafu emele iikho-odineyith zepozishini
      thayim zowona mphakamo mkhulu kunayo yonke ofikelelwe yibhola emva
      kwebhawunsi yesibini?

      A    P

      B    Q

      C    R

      D    S                                                                               (2)

  Ushicilelo luselugcinweni                                                             Tyhila

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 (EC/SEPTEMBA 2021)                     IINZULULWAZI P1                                   5

1.5 Ikhayinethikhi eneji yemoto ehamba ngevelosithi u v ngu K. ivelosithi yemoto
    itshintshela ku 2v. Ithini ikhayinethikhi eneji entsha yemoto?

     A       ¼K

     B       ½K

     C       2K

     D       4K                                                                         (2)

1.6 Umthombo wesandi uya ngakwi obhzeva emileyo nge velosithi engaguqukayo.

     Yeyiphi kwezi zilandelayo ecacisa nzulu ukohluka kwe               frikhwensi
     neweyivulenthi eviweyo/boniweyo kuleyo yomthombo wesandi?

                      Iweyivulenthi       ifrikhwensi
                   eviweyo/boniweyo   eviweyo/boniweyo
     A             Inkulu kuno/kune Inkulu kuno/kune

     B             Incinane kuno/kune    Incinane kuno/kune

     C             Incinane kuno/kune    Inkulu kuno/kune

     D             Inkulu kuno/kune      Incinane kuno/kune                             (2)

1.7 Iphatheni yefildi yombane phakathi kwezifiye ezitshajiweyo ezibini u A no B,
    ubonisiwe ngezantsi.

         Sesiphi esi NYE kwezi ziqwengana zilandelayo, ngokubhekiselele kwitshaji
         kwizifiye u A no B, ESICHANEKILEYO?

         A        Isifiye u A sitshajwe sanegethivu, sona isifiye u B sitshajwe
                  saphozithivu.

         B        Isifiye u A sitshajwe saphozithivu, sona isifiye u B sitshajwe
                  sanegethivu.

         C        Zozibini izifiye u A no B zitshajwe zaphozithivu.

         D        Zozibini izifiye u A no B zitshajwe zanegethivu.                      (2)

 Ushicilelo luselugcinweni                                                     Tyhila

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 6                                    IINZULULWAZI P1                            (EC/SEPTEMBA 2021)

1.8    I SI yunithi yokumesharisha/yomlinganiselo weREYITHI YOKUQUKUQELA
       KWETSHAJI kwiconductor yi ...

       A      watt.

       B      volt.

       C      ampere.

       D      coulomb.                                                                        (2)

1.9    Yeyiphi kwezi zilandelayo iinguqu kumyilo wejenereyitha i AC enokunyusa
       eyona miphumela ephezulu ye emf?

       A      Tshintsha pholarithi yoozibuthe (iimagnethi).

       B      sebenzisa iisliph ringi ezinkudlwana kunezo zisetyenzisiweyo.

       C      sebenzisa iibhrashi ezinkudlwana kunezo zisetyenzisiweyo.

       D      Nyusa inani lemijikelezo kwikhoyili.                                            (2)

1.10 Ilayini emishin spekhthram yenzeka xa ...

       A      ii elekhtroni ezikwi grawundi steyithi zisiya kwi eneji steyithi ephezulu

       B      ii elekhtroni ezikwi eneji steyithi ephezulu zisiya kwi eneji steyothi
              engezantsi

       C      ilitha elimhlophe lidlula kwigesi ebandayo.

       D      ilitha elimhlophe lidlula kwiprizim engunxantathu.                             (2)
                                                                                            [20]

 Ushicilelo luselugcinweni                                                                 Tyhila

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(EC/SEPTEMBA 2021)                  IINZULULWAZI P1                                               7

UMBUZO 2

2.1   Iibhlokhi ezimbini ezinobunzima u 2 kg no 5 kg zidityaniswe ngomsonto
      ongandisekiyo. Iibhlokhi zitsalwe kumphezulu orhabaxa othe tye (horizontali)
      yifosi u F. Le fosi yenza i engile engu 20° ukusuka kuhorizontali. Bhekisela
      kumfanekiso ongezantsi.

      Iibhlokhi u 2 kg no 5 kg beva ikhayinethikhi frikhshinal fosi engu 10 N no
      15 N ngokulandelelana kwazo.

                                                                          F

                                            5 kg                20o
                     2 kg

      2.1.1    Chaza Umthetho Wesibini kaNewton ngamagama.                                  (2)

      2.1.2    Zoba ifri bhodi dayagram eleyibhelishiweyo yebhlokhi u 5 kg.                 (5)

      2.1.3    Bala ubungakanani befosi u F emayisetyenziswe kwi engile engu
               20° ukusuka kuhorizontali ukwenza iibhlokhi zombini zi
               akhselereyithe ngo 2 m.s-2 ukuya ngasekunene.                                (5)

2.2 Umhlaba usebenzisa ifosi engu 1 842,50 N ukugcina isathelayithi enemesi
    engu 200 kg ikwi obhithi ukujikeleza umhlaba njengoko kubonisiwe
    kumfanekiso ongezantsi.

      Bala umgama, ngentla ko MHLABA, apho isathelaythi ijikeleza umhlaba.               (5)
                                                                                        [17]

Ushicilelo luselugcinweni                                                          Tyhila

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8                                             IINZULULWAZI P1                (EC/SEPTEMBA 2021)

UMBUZO 3

Igrafu yevelosithi vesazi thayim engezantsi ibonisa ukuhamba kwebhola ephoswe
ezantsi ngokuthe ngqo isuka enkcochoyini yesakhiwo ibhawunsa ukusuka
kumgangatho xa ibetha phantsi.

Ungayinanzi ifrikhshini                 yomoya.   THATHA   UKUYA   PHEZULU   NJENGO
PHOZITHIVU.

                                   12

             Ivelosithi (m.s-1)
                                   0
                                                            t
                                                                         Ixesha (s)

                                  -20

                                  -25

3.1 Usebenzisa ii IKHWEYISHINI ZEMOWUSHINI KUPHELA, bala:

      3.1.1 Umphakamo ukusuka apho ibhola ibiphosiwe                                       (3)

      3.1.2 Ixesha t elikwigrafu                                                           (5)

      3.1.3 Ubungakanani bedispleysmenti yebhola ukusuka ekuphosweni kwayo
            ukuya kwixesha u t                                                             (4)

3.2 Zoba igrafu yepozishini vesaz thayim yokuhamba kwebhola ukusuka
    ekuphosweni kwayo de ifike enkcochoyini emva kwebhawunsi. SEBENZISA
    IGRAWUNDI/PHANTSI NJENGEPOZISHINI ENGU ZIRO.

      Bonisa oku kulandelayo kwi grafu yakho:

          Umphakamo ukusuka apho ibhola ibiphoswe
          Ixesha u t                                                                     (3)
                                                                                         [15]

Ushicilelo luselugcinweni                                                              Tyhila

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(EC/SEPTEMBA 2021)                 IINZULULWAZI P1                                      9

 UMBUZO 4

 Umzobo ongezantsi ubonisa itroli u A enobunzima engu 2 kg ihamba ngevelosithi
 u v m∙s−1 ukuya ngase mpuma kumphezulu othe ngqo othe tye (horizontali)
 ingqubana ngeentloko netroli u B enobunzima u 4 kg ehamba ngevelosithi
 engaguqukiyo engu 5 m∙s−1ukuya ngasentshona.

 Emva kongqubano, iitroli zombini ziyancamathelana zihambe ngevelosithi engu
 1,67 m·s-1 ukuya ngasentshona. Ungqubano luthathe u 0,01 s. Ungayinanzi
 impembelelo yefrikhshini.

                                                           5 (m.s-1)

                 v (m.s-1)
                                                       B

                             A
                                                      4 kg
                            2 kg

 4.1 Chaza iprinsipli yekhonzeveyshini yemomentam eliniya ngamagama.                   (2)

 4.2 Bala:

       4.2.1 Ubukhulu bevelosithi v yetroli u A ngaphambi kokungqubana netroli u
             B                                                                         (4)

       4.2.2 Ifosi esetyenziswe ngu B kwitroli u A                                     (4)
                                                                                      [10]

Ushicilelo luselugcinweni                                                    Tyhila

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 10                                   IINZULULWAZI P1                      (EC/SEPTEMBA 2021)

UMBUZO 5

Ifosi engu 62,5 N isetyenziswe kwitroli enobunzima obungu m kg ipharaleli
kumphezulu othambekileyo njengoko kubonisiwe ukuyigcina isiya ezantsi
kumphandle othambekileyo NGEVELOCITY ENGAGUQUKIYO. Umphakamo
obheke phezulu (ivethikhali hayithi) womphezulu othambekileyo ngu 12 m.
Bhekisela kumfanekiso ongezantsi.

Ikhayinethikhi frikhshinali fosi engu 35,5 N isebenza kwitroli ngexesha isehla
kumphezulu wethambeka.

          62,5 N

                     A

               12 m

                                                                 30°
                                                                       B

5.1    Bhala igama lekhon’zeveythivu fosi esebenza kwi troli.                            (1)

5.2    Bala iwekhi dani eyenziwe yifrikhshinal fosi kwi troli.                           (4)

5.3    Bhala phantsi itsheyinji kwikhayinethikhi eneji xa itroli ifika kumzantsi
       wethambeka.                                                                       (1)

5.4    Sebenzisa iwork-eneji theorem ukubala ubunzima u m, betroli.                      (5)
                                                                                        [11]

 Ushicilelo luselugcinweni                                                           Tyhila

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(EC/SEPTEMBA 2021)              IINZULULWAZI P1                                       11

UMBUZO 6

6.1 Umtshini wokukhangela isandi (sound detector) omileyo ubekwe endaweni
    ethile ushicelela izandi zamaza ezingama 520 ngomzuzu ezisuka kumthombo
    (isosi) wesandi ohambayo okhupha izandi zamaza ezinefrikhwensi engu
    480 Hz.

      6.1.1 Bhala phantsi ifrikhwensi yamaza esandi ashicilelwe ngumtshini
            wokushicilela isandi ibekwii Hz.                                         (1)

      6.1.2 Chaza igama lefenomenon ecacisa        ngokubanzi   ukutshintsha
            kwefrikhwensi eboniweyo/eviweyo.                                         (2)

      6.1.3 Ingaba umthombo wesandi uya NGAKU mphulaphuli/mbukeli okanye
            UYASUKA kumphulaphuli/kumbukeli? Nika isizathu sempendulo
            yakho.                                                                   (2)

      6.1.4 Bala ivelosithi ohamba ngayo umthombo wesandi. Thatha ivelosithi
            yesandi njengo 343 m·s-1.                                                (5)

      6.1.5 Izawutshintsha njani iweyivulenthi yesandi eyenziwe ngumthombo
            wesandi xa ifrikhwensi yamaza esandi ibangaphezulu kuka 480 Hz?

              Bhala kuphela IYANDA, IYANCIPHA okanye IHLALA INJALO. Cacisa
              impendulo usebenzisa i ikhweyshini yamaza.                             (2)

6.2 Imigca yespekhtram esuka kwinkwenkwezi ekude ibonakala ikekelela
    ngakubomvu. Cacisa igama elikrwelelwe umgca ngaphantsi.                          (2)

6.3 Bhala phantsi umsebenzi ubemnye weDopla ifekhthi kwinkalo yamachiza.             (1)
                                                                                    [15]

Ushicilelo luselugcinweni                                                  Tyhila

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12                                   IINZULULWAZI P1                           (EC/SEPTEMBA 2021)

UMBUZO 7

7.1 Isifiye u A esinetshaji engu -5 µC sixhonywe ngokubhekelele nkqo phezulu
    ngomsonto ongandisekiyo. Ipoyinti u P ikumgama oli 100 mm ngasekunene
    kuka A njengoko ibonakalisiwe kumfanekiso 1 ongezantsi.

     UMFANEKISO 1

                                                                           P
                                A = -5 µC               100 mm

     7.1.1     Ingaba isifiye u A UMKELWE or UFUMENE iielektroni ukuze
               abenetshaji engu -5 µC?                                                            (1)

     7.1.2     Bala inani lee elektroni ezimkileyo okanye ezifunyenwe sisifiye
               esitshajiweyo u A, ukufumana itshaji engu -5 µC.                                   (3)

     7.1.3     Bala i elektriki fildi ku P, eyenziwa bubukho besifiye esitshajiweyo u A.          (5)

7.2 Isifiye esifanayo u B onetshaji engaziwayo sibekwe kwiqonga elikhuselweyo
    (elogqunyiweyo) sisondezwe kwisifiye u A. Isifiye esitshajiweyo u A
    ujingajingela ngasekunene akugqiba ame ukuze umsonto wenze i engile engu
    30° nomnyuko ngqo (vethikhali) kwaye ithenshini kumsonto ingu 25 N. Umgama
    phakathi kwezizifiye zitshajiweyo ungu 50 mm njengoko kubonisiwe
    kumfanekiso 2 ongezantsi.

     UMFANEKISO 2

                                             30o

                               B                               A = -5 µC
                                          50 mm

     7.2.1     Ingaba itshaji kwi sifiye u B IPHOZITHIVU okanye NEGETHIVU? Nika
               isizathu sempendulo.                                                               (2)

     7.2.2     Bala ubungakanani betshaji kwisisfiye u B.                                      (6)
                                                                                              [17]

Ushicilelo luselugcinweni                                                                Tyhila

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(EC/SEPTEMBA 2021)                           IINZULULWAZI P1                           13

UMBUZO 8

8.1 Iqela labafundi beBanga le 12 bafuna ukufumanisa ukuba yeyiphi ikhondakhtha
    elungele ukusetyenziswa njenge hithingi khoyli yeketile abayenzela iprojekhti
    yabo ye Eskom Expo.

      Bakonekhthe ikhondakhtha nganye kwezintathu (uA, B no C) kwi sekethe baze
      bamejarisha ikharenti edlula kwi khondakhtha nephothenshiyali difrensi kwii
      khondakhtha. Iziphumo ziboniswe kwi grafu engezantsi.

                                                  A

                            I Kharenti (A)
                                                                B

                                                                    C

                                               Phothenshiyal difrensi(V)

      8.1.1 Nika naziphi iivariyabhuli EZIMBINI ekufuneka zigcinwe zingatshintshi
            ukuze oluphando lube lolungenamakhwiniba (fair).                           (2)

      8.1.2 Bhala ifizikhali khwantithi emelwe yigradiyenti yegrafu nganye.            (1)

      8.1.3 Yeyiphi kwezi khondakhtha eNYE elungele ukusetyenziswa njenge
            hithing khoyli yeketile? Xhasa impendulo yakho.                            (2)

8.2 Umfanekiso wesekethe ongezantsi umele indibanisela yeeresista ezikwi sirisi
    nezikwi pharaleli. Ibhethri ine emf engu 12 V nerezistensi yangaphakathi u r
    engaziwayo.

                                             𝜺 = 12 V

                                                        r

                  1,5 A                  A
                               X                            S
                                             2Ω

                                             3Ω                     4Ω
                                                                Y

Ushicilelo luselugcinweni                                                     Tyhila

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14                                    IINZULULWAZI P1                       (EC/SEPTEMBA 2021)

       Xa iswitshi u S IVULIWE, iridingi kwi ametha A ingu 1,5 A. Bala i:

       8.2.1      Rezistensi epheleleyo yesekethi                                          (3)

       8.2.2      Resistensi yangaphakathi yebhethri                                       (4)

       8.2.3      Eneji ekhutshwe yiresista u 3 Ω kwimizuzu emi 3                          (3)

 8.3   Iswitshi u S ngoku IVALIWE.

       Ingaba zingachaphazeleka njani nganye kwezi zilandelayo? Bhala kuphela
       IYANDA, IYANCIPHA okanye IHLALA INJALO.

       8.3.1      Irezistensi epheleleyo yesekethi                                         (1)

       8.3.2      Iridingi kwi amitha u A.                                                 (1)

 8.4   Ucingo lokudlulisa umbane oluneresistensi engananzwanga ngoku
       lukonekhthwe phakathi kuka X no Y ngokomboniso ongasentla. Luzakuba
       nomphumela onjani olu tshintsho kwithempritsha yebhethri?

       Bhala kuphela IYANDA, IYANCIPHA okanye IHLALA INJALO.                   Cacisa
       impendulo yakho ngokupheleleyo.                                                    (3)
                                                                                         [20]

Ushicilelo luselugcinweni                                                             Tyhila

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(EC/SEPTEMBA 2021)                 IINZULULWAZI P1                                      15

UMBUZO 9

Iijenereyitha ze AC kumaziko ombane ophehlwa ngamalahle ziphaka uninzi lwe
eneji yombane edingeka elizweni.

9.1     Chaza inguqulelo ye eneji eyenzekayo xa le jenereyitha isebenza.                (2)

9.2     Chaza umohhluko UBEMNYE ngobume phakathi kwe jenereyitha eyi AC
        nejenereyitha eyi DC.                                                           (1)

9.3     Zoba igrafu yephothenshiyal deferensi vesaz thayim yale jenereyitha ye AC.
        Leyibhelisha ngokucacileyo ii ekziz ubonise u Vmax kwi eksis ye
        phothenshiyal diferensi.                                                        (2)

Isixhobo sombane silinganiselwe u 2 000 W, 230 V. Esi sixhobo sikonekhthwe kwi
phawa sosi eyi olthaneythingi kharenti.

Bala:

9.4     Eyona kharenti iphezulu (Imax) eveliswe yijenereyitha                           (4)

9.5     Eyona voltheyiji iphezulu (Vmax) ekhutshwe yi jenereyitha                       (3)
                                                                                       [12]

Ushicilelo luselugcinweni                                                     Tyhila

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16                                         IINZULULWAZI P1                       (EC/SEPTEMBA 2021)

UMBUZO 10

Iqela labafundi lwenza i ekhsperimenti ukufumanisa unxulumano phakathi kwe
                                 1
inverse ye wayivlenthi             yee insident foton kwintsimbi kunye neyona khayinethikhi
                                
eneji inkulu (Ek(max)) yee fothoelekhtroni ezikhutshwe kumphezulu wepleyiti yentsimbi.
Babonise iziphumo zabo njengoko kubonisiwe kwigrafu engezantsi

               Ek(max) (J)

                                            X                    1
                                                                     (m-1)
                                                                 λ

                            C

10.1 Yeyiphi ifizikhal khwantithi emelwe ngunobumba u C (i intasephthi ye eksis
     eya eme ngqo) kwigrafu? Sebenzisa i ikhweyshini efanelekileyo ukucacisa
     impendulo                                                                                      (3)

10.2 Iifothoni zelitha ezinefrikhwensi engu 6,16 x 1014 Hz zi insidentwe kwipleyiti ye
     methali kwaye iifothoelekhtroni zikhutshwe ngeyona khayinethikhi eneji
     iphezulu engu 5,6 x 10-20 J.

       Bala ubungakanani befizikhal khwantithi emelwe ngunobumba u X kwi grafu.                     (5)

10.3 Iqondo lokukhanya lelitha eliyi insidenti ngoku lonyuselwe. Ingaba olu
     tshintsho luzoba nomphumela onjani kwezi zinto zilandelayo? (Bhala kuphela
     IYANDA, IYANCIPHA okanye IHLALA INJALO)

       10.3.1 Igradiyenti yegrafu. Cacisa impendulo yakho.                                          (2)

       10.3.2 Eyona khayinethikhi eneji inkulu yee fothoelekhtroni ezikhutshiweyo.
              Zoba igrafu yonxulumano phakathi kweqondo lokukhanya kwe litha
              lee insident fothon neyona khayinethikhi eneji inkulu ukucacisa
              impendulo yakho.                                                                   (3)
                                                                                                [13]

                                                                      AMANQAKU EWONKE:          150

Ushicilelo luselugcinweni                                                                  Tyhila

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(EC/SEPTEMBA 2021)                   IINZULULWAZI P1                                  17

                            DATA FOR PHYSICAL SCIENCES GRADE 12
                                     PAPER 1 (PHYSICS)
                             IDATA YEENZULULWAZI IBANGA LE 12
                                    IPHEPHA 1 (FIZIKHSI)
TABLE 1: PHYSICAL CONSTANTS/ITHEYIBHILE 1: IIFIZIKHALI KHONSTENTI
                                                 SYMBOL/
                 NAME/IGAMA                                  VALUE/IVELYU
                                                 ISIMBOLI
Acceleration due to gravity / akhselereyshini ye
                                                     g          9,8 m•s-2
gravithi
Universal gravitational constant / khonstenti ye
                                                     G    6,67 × 10-11 N•m2.kg-2
yunivesal gravitheyshini
Speed of light in a vacuum / santya se litha kwi
                                                     c       3,0 × 108 m•s-1
vakhthyum
Planck's constant / Ikhonstenti ka Planki            h       6,63 × 10-34 J•s
Coulomb's constant / Ikhonstenti ka Khulomb            k     9,0 × 109 N•m2•C-2
Charge on electron / Itshaji ye elekhtroni             e        -1,6 × 10-19 C
Electron mass / Imesi ye elekhtroni                    me     9,11 × 10-31 kg
Mass of earth / Imesi yomhlaba                         M       5,98 × 1024 kg
Radius of earth / Ireyidiyasi yomhlaba                 RE      6,38 × 103 km

Ushicilelo luselugcinweni                                                    Tyhila

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18                                  IINZULULWAZI P1                                 (EC/SEPTEMBA 2021)

TABLE 2: FORMULAE/I THEYIBHULI YESI 2: II FOMYULA

MOTION / IMOWUSHINI
v f  vi  a t                            Δx  v i Δt  21 at 2 or/of Δy  v i Δt  21 at 2
                                                 v  vf                 v  vf 
v f  v i  2ax or/of v f  v i  2ay
     2       2              2   2
                                           Δx   i       Δt or/of Δy   i       Δt
                                                 2                      2 

FORCE / IFOSI
Fnet  ma                                 p mv
fsmax = µsN                               fk = µkN
Fnet t  p
                                           w  mg
p  mv f  mv i
         Gm 1m 2                                M
F               2                        g = G d2
             d

WORK, ENERGY AND POWER / IWEKHI, I ENEJI NEPHAWA

W = FΔxcosθ                               U  mgh              or/okanye EP  mgh
                                           Wnet  K or/okanye Wnet  Ek
         1               1
K         mv2 or/of Ek  mv2
         2               2                 K  K f  K i     or/okanye Ek  Ekf  Eki
Wnc  K  U or/okanye                        W
                                          P
Wnc  Ek  Ep                                t
Pav = Fvave

ELECTROSTATICS / I ELEKHTHROSTATIKI
   kQ1Q 2                         kQ
F     2
                               E 2
     r                             r
    V                             F
E                             E
    d                             q
         W                                     Q
V                                        n=
         q                                     qe

Ushicilelo luselugcinweni                                                                        Tyhila

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(EC/SEPTEMBA 2021)                     IINZULULWAZI P1                                                           19

ELECTRIC CIRCUITS/ IISEKETHE ZOMBANE
   V                            emf (ε) = I(R + r)
R
   I                            emk (ε) = I(R + r)
R s  R1  R 2  ...
 1  1   1                                     q = IΔt
          ...
R p R1 R 2
W = Vq                                             W
                                              P
                                                   Δt
W = VI  t
                                              P = VI
W= I2R  t
                                              P = I2R
W= V Δt
       2
                                                   V2
                                              P
       R                                           R

ALTERNATING CURRENT/ I OLTHANEYITHINGI KHARENTI
       I
I rms  max            /              I
                               I wgk  maks   Paverage  Vrms I rms           /   Pgemiddeld  Vwgk I wgk
         2                              2

           Vmax                               Paverage  I rms
                                                           2
                                                               R          /       Pgemiddeld  I 2wgkR
Vrms                      /
              2                                                                                   2
                                                        V2                                       Vwgk
Vwgk 
           Vmaks                              Paverage  rms          /           Pgemiddeld 
                                                         R                                        R
              2

Ushicilelo luselugcinweni                                                                               Tyhila

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