Physical Sciences Grade 12 P1 KZN Mock 2025 Question Paper

} KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 12 PHYSICAL SCIENCES P11 (PHYSICS) PREPARATORY EXAMINATION SEPTEMBER 2025 3 hours This question paper consists of 15 pages and 3 data sheets.

Physical Sciences P1 September 2025 Preparatory Examination INSTRUCTIONS AND INFORMATION I oo N & 11. This question paper consists of TEN questions. Answer ALL the questions in the ANSWER BOOK. Start EACH question on a NEW page in the ANSWER BOOK. Number the answers correctly according to the numbering system used in this question paper. Leave ONE line between two sub-questions, for example between QUESTION 2.1 and QUESTION 2.2. You may use a non-programmable calculator. You may use appropriate mathematical instruments. Show ALL formulae and substitutions in ALL calculations. Round off your final numerical answers to a minimum of TWO decimal places. Give brief motivations, discussions et cetera where required. You are advised to use the attached DATA SHEETS. Write neatly and legibly. Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 1: MULTIPLE CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A — D) next to the question number (1.1 ~ 1.10) in the ANSWER BOOK, for example 1.11 A. 1.1. A physics learner stands on a scale in a lift that is moving upwards at CONSTANT VELOCITY. The reading on a scale, compared to the reading when the lift was stationary, would be... A zero. B greater. Cc smaller. D the same. (2) 1.2 Two blocks of masses m1 and mz, are connected to each other by a light inextensible string. The blocks are accelerated upwards by a force F. F m2 The tension in the string between the blocks will be... A equal to F. B equal to mag. c less than mag. D greater than mzg. (2) 1.3 Aball is dropped from a height h and hits the ground with a speed v. The speed of the ball at the moment when it reaches half its initial height is... A v B Vv v2 Cc Vv 2 D Vv 4 (2) Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination 1.4 Atrolley with a mass m has momentum p. The kinetic energy of the trolley will be... A pm BO OP m Cc p2m 2, D p? 2m (2) 1.5 An object is moved from rest in a straight line across a flat surface by a changing horizontal force. The changing force is plotted against the position of the object to produce the graph below. 19] eee 2 Force (N) 0 Position (m) 8 The work done on the object by the applied force from x = 0 m tox = 8m 1S... A 40d B80J C 08J D 1,254 (2) 1.6 The reason why the observed pitch of sound wave of an ambulance decreases as the ambulance moves away from a stationary observer, is because the amplitude of the sound wave increases. amplitude of the sound wave decreases. wavelength of the sound wave increases. wavelength of the sound wave decreases. (2) 0OWw>Y Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination 1.7 Point charges with magnitudes q, 2q, 3q and 4q are placed in different electric fields. The force on each point charge is measured and the results are recorded in the table shown below. Which point charge experiences the greatest electric field strength? Magnitude of point charge | Force (N) experiencing a force A 4q 60 B q 20 Cc 2q 25 D 3q 33 1.8 Two identical light bulbs, P and Q, are connected as shown in the circuit diagram below. The internal resistance of the battery can be ignored. —a)t|r-— a, When switch S is closed, which combination best represents the effect on the ammeter reading and the brightness of bulb P? Reading on ammeter | Brightness of bulb P A Increases Stays the same B Stays the same Increases Cc Stays the same Stays the same D Increases Increases (2) 1.9 The diagram below shows a coil in a magnetic field. N $s N SJ} Xbb y When the coil is part of a DC motor, which ONE of the following must be connected to X and ¥? A Split ring (commutator) B Slip rings Cc AC supply D Soft iron core (2) Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination 1.10 High-energy light is shone onto a metal plate. Electrons are emitted from the metal plate. Which combination will be true when the wavelength of the light is decreased? Kinetic energy of the | Number of emitted emitted electrons electrons A Decreases Decreases B Increases Decreases C__ | Increases Stays the same D | Decreases Stays the same Copyright Reserved (2) [20] Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 2 (Start on a new page) A block X of mass 6 kg, at rest on a rough horizontal surface, is connected to another block Y of mass 3 kg by means of a light inextensible string which passes over a frictionless pulley. A force of 50 N is applied horizontally to block X, as shown in the diagram below. Y 3 kg 50 N 6 kg x The coefficient of kinetic friction between the horizontal surface and block X is 0,3 and there is no friction between the surfaces of blocks X and Y. 2.1 Draw a labelled free-body diagram showing all the HORIZONTAL forces acting on block X. (3) 2.2 State Newton's Second Law in words. (2) 2.3 Calculate the magnitude of the: 2.3.1 Frictional force acting on block X (3) 2.3.2 Acceleration of each block (6) 2.4 Amanon the surface of planet M weighs HALF his weight compared to his weight on the surface of the Earth. The mass of planet M is TWICE that of the Earth. 2.4.1 State Newton's Law of Universal Gravitation in words. (2) 2.4.2 Calculate the radius of planet M in terms of the radius of the Earth. (4) [20] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 3 (Start on a new page) A bail of mass 500 g is projected vertically downwards towards the ground from a height of 2 m at a velocity of 1,5 m.s"' The position-time graph for the motion of the ball is shown below. 0 tite tb tet Time (s) 0,6 — 6 = -0,8}- _ no [e) a Ignore the effects of air friction. 3.1. Write down the maximum vertical height reached by the ball after the second bounce. (1) 3.2 Calculate the: 3.2.1 Speed with which the ball hits the ground for the first time (3) 3.2.2 Time t, indicated on the graph (3) 3.2.3 Velocity with which the ball rebounds from the ground during the first bounce. (4) The ball is in contact with the ground for 0,2 s during the first bounce. 3.3 Calculate the force exerted by the ground on the ball during the first bounce. (4) 3.4 Draw a velocity-time graph for the motion of the ball from the time that it is projected to the time when it rebounds to a height of 0,8 m. Clearly show the following on your graph: e Time ti indicated on the graph e Velocity of the ball when it hits the ground for the first time e Velocity of the ball when it rebounds from the ground during the first bounce (4) [19] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 4 (Start on a new page) A boy, of mass 60 kg on ice skates, is stationary on a frictionless surface. He throws an object, of mass 4 kg, at 3 m:s*' horizontally in the westerly direction as shown in the diagram below. N WwW E 3m:s" Ss At the instant the object leaves the boy's hand, the boy starts moving. Ignore the effects of friction. 4.1 In which direction does the boy move? Write down only EAST or WEST. (1) 4.2 Name and state the law which explains the direction in which the boy experiences a force when he throws the object. (3) 4.3 Calculate the speed of the boy immediately after the object leaves his hand. (4) 4.4 How will the answer to QUESTION 4.3 be affected if: 4.4.1 The boy throws the object at a higher velocity in the same direction Choose from: INCREASES, DECREASES or REMAINS THE SAME. (1) 4.4.2 The boy throws the object of double the mass at the same velocity. Choose from: INCREASES, DECREASES or REMAINS THE SAME. (1) 4.4.3 Explain the answer to QUESTION 4.4.2 (2) [12] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 5 (Start on a new page) A box of mass 7 kg, which is initially at rest, is acted upon by a constant force of 80 N that is applied at an angle of 6 to the horizontal. 80 N 7 kg e@ * 2m 4 The box experiences a constant frictional force of 8 N as it moves from rest at point X along a horizontal surface to point Y and passes point Y with a speed of 1,5 m-s 5.1 Drawa labelled free-body diagram showing ALL the forces acting on the box as it moves. (4) 5.2 Define the term work done by a force. (2) 5.3 Calculate the size of angle 6, by using ENERGY PRINCIPLES only. (4) 5.4 The angle between the applied force of 80 N and the horizontal is now decreased. What effect will this have on the work done by the same applied force when the box is moved from point X to point Y? Write only INCREASES, DECREASES or REMAINS THE SAME. (2) [12] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 6 (Start on a new page) Abat flies away from a stationary bat watcher at a constant velocity. The bat constantly emits sound waves at a frequency of 875 Hz. The bat watcher hears a change in pitch as the bat moves away from her. 6.1 Write down the property of sound that is related to pitch. (1) 6.2 Give a reason why the bat watcher observes a change in pitch as the bat moves away from her. (2) Shown below is the air pressure versus distance graph, which represents the sound waves detected by the bat watcher as the bat moves away from her with a constant velocity. The speed of sound in air is 340 m-s". 1m Mi ene en nee nennnnnaaianaaneannnnnanenn sana enna anna n= > 2 b> | wm gn 2 E10 < Distance (m) 6.3 Use the graph to write down the wavelength of the detected waves. (1) 6.4 Determine the: 6.4.1. Frequency of the sound waves detected by the bat watcher (3) 6.4.2 Velocity at which the bat flies (5) [12] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 7 (Start on a new page) The diagram below shows two identical metal spheres, R and S, each placed on an insulated stand. The spheres R and S carry charges of +9 uC and -5 UC, respectively +9 uC -5 uC The spheres R and S are brought into contact for a while and then placed 30 cm apart. 7.1. Calculate the charge on each sphere immediately after separation. (2) 7.2 Draw the resultant electric field pattern due to spheres R and S after separation. (3) After R and S have been in contact and separated, a third sphere T of charge +1 uC, is now placed between them as shown in the diagram below. _ 10cm >| 20 cm — | — 7.3. Calculate the net electrostatic force experienced by T due to R and S. (5) 7.4 Define the electric field at a point. (2) 7.5 Calculate the net electric field at the location of T due to R and S. (3) [15] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 8 (Start on a new page) The circuit diagram below shows a battery with an emf of 12V and an unknown internal resistance, r. The resistance of the ammeters and connecting wires can be ignored. The resistance of the voltmeters is very high. i ¢€=12V @)— t= iS) 149 120 8Q 8.1 Write down the reading on voltmeter V+ when switch S is open. (1) 8.2 The switch S is now CLOSED. The reading on voltmeter V2is 6 V. Determine the: 8.2.1 Reading on ammeter Ai (3) 8.2.2 Effective resistance of the parallel resistors (3) 8.2.3 Internal resistance, r, of the battery (4) 8.2.4 Reading on ammeter Az (4) 8.3 The cost of electricity is R2,65 per kWh. A 3 500 W electrical oven is used for 50 minutes. Calculate the cost of using the oven for 50 minutes. (4) [19] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 9 (Start on a new page) Asimplified representation of a DC motor is shown in the diagram below. The current in the coil is in the direction X to Y. 9.1 Name the component that ensures that the coil rotates continuously in ONE DIRECTION. (1) 9.2 In which direction will the coil rotate? Write down only CLOCKWISE or ANTI-CLOCKWISE. (2) 9.3 Write down the energy conversion which takes place while the motor is working. (1) 9.4 AnAC generator, producing a maximum voltage of 311,12 V, is connected to an electric heater of resistance 30 Q. Calculate the: 9.4.1 Root mean square (rms) value of the voltage (3) 9.4.2 Root mean square (rms) value of the current in the heater (4) [11] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination QUESTION 10 (Start on a new page) The graph below represents the maximum kinetic energy of an electron, Eximax), ejected from the surface of a metal as the frequency (f) of light shone on it is increased. y S 3x | ‘S ui tt = 4 vA { 0 2 4 6 8 10 f (x10"4 Hz) 10.1 Define threshold frequency. (2) 10.2 Write down the threshold frequency of the metal. (2) 10.3 Determine the value of X as indicated on the graph. (4) 10.4 The intensity of the incident light is increased without changing the frequency. How will this affect the maximum kinetic energy of the emitted electrons? Choose from INCREASES, DECREASES or REMAINS THE SAME. Give a reason for the answer. (2) [10] TOTAL: [150] Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS / TABEL 1: FISIESE KONSTANTES NAME / NAAM SYMBOL / SIMBOOL VALUE / WAARDE Acceleration due to gravity Swaartekragversnelling 9,8 m-s? Radius van Aarde Universal gravitational constant G 6,67 x 10° N-m2-kg? Universele gravitasiekonstante Speed of light in a vacuum Cc 3,0 x 108 m:s* Spoed van lig in 'n vakuum Planck’s constant h 6,63 x 104 Js Planck se konstante Coulomb's constant k 9,0 x 10°N-m?-C-2 Coulomb se konstante Charge on electron e -1,6 x 10°19C Lading op electron Electron mass Me 9,11 x 10°31 kg Elektronmassa Mass of Earth M 5,98 x 1074 kg Massa van Aarde Radius of Earth Re 6,38 x 10° m Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination TABLE 2: FORMULAE / TABEL 2: FORMULES MOTION / BEWEGING Ve =Vi +a At Ax = v,At + tadt? or/of Ay = v,At + taAt? v,? =v, +2aAxorlofv,’ =v," +2aAy Ax -(% _ Jat orioray -(% . Ja FORCE / KRAG Fret =ma p=mv fs”) = sN fc = kN FnetAt = Ap w=mg Ap = mvt - mvi _Gmymz _Gm FES =a WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING W =FAxcos@ U=mgh orlof E,=mgh W,e: =AK orlof = Wo = AE, K= mv? orlof = E, = 5 mv? net net ‘ AK=K,—-K;, or/of AE, =E, —E, W,- =AK+AU or/of W,, = AE, +AE, _W At Pave = FVave / Pgem = Fvgem WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG v=fr T= 4 f + pee, E=hf orlof E=h©& viv, uy E = WotEx¢max) Or/of E = Wo+Kmax where/waar E = hf and/en Wo = hf and/en Eximax)= i mVaiax orlof Kmax= i mVPvax Copyright Reserved Please turn over

Physical Sciences P1 September 2025 Preparatory Examination ELECTRICITY AND MAGNETISM/ELEKTRISITEIT EN MAGNETISME & Vv emf (€) =I(R +r) | emk (€)=|(R +1) R, =R,+R, +... 1.101 q= lat = ++. R, R, Rp 7 _W W=Vq = W = ViAt P=VI W =/?RAt P=PR _ Vat v R P = ELECTROSTATICS/ELEKTROSTATIKA a E “2 Bet ve q q _@ _Q n=—orn=— e qe Piss 7 ae ee / Py emiadeta= Viwselwar I I | ae = max / I = —maks V2 wh 2 Pave = Ie aR / Pyemiddeld= TegnlR V, V, Vics — max / Vo =a mals Pie = R / Pyemiddeld= R- Copyright Reserved