Physical Sciences Grade 12 P1 KZN June 2025 Question Paper

| KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE | GRADE 12 Poe ee Toe PEPER SPOR EPO RUPORESRS ER SERRE EE ETERS ea * : PHYSICAL SCIENCES P1 (PHYSICS) : ; JUNE EXAMINATION : 2 2025 : MITUTTTETTETTUTITITTTT TTT ree kc MARKS: 150 TIME: 3 hours This question paper consists of 11 pages and 3 data sheets. Copyright Reserved Please turn over

2025 June Examination INSTRUCTIONS AND INFORMATION 1. This question paper consists of EIGHT questions. Answer ALL the questions in the ANSWER BOOK. 2. Start EACH question on a NEW page in the ANSWER BOOK. 3: Number the answers correctly according to the numbering system used in this question paper. 4. 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. eo eonosn Give brief motivations, discussions et cetera where required. 10. You are advised to use the attached DATA SHEETS. 11. Write neatly and legibly. Copyright Reserved Please turn over

2025 June Examination QUESTION 1: MULTIPLE CHOICE QUESTIONS Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter (A — D) next to the question number (1.1 — 1.10) in the ANSWER BOOK. 1.1. Ahorizontal force F is applied to a crate, causing it to move over a rough, horizontal surface as shown below. crate |_________» F The kinetic frictional force between the crate and the surface on which it is moving depends on ... A the applied force F. B how fast the crate moves on the surface. Cc the surface area of the crate in contact with the floor. D the upward force exerted by the surface on the crate. (2) 1.2 Two forces, F1 and Fe, can be represented with a single force of 8 N. If the magnitude of F: is 3 N, which one of the following can be the magnitude of force F2? A 3N B 4N Cc 10N D 13N (2) 1.3. Two hypothetical planets, X and Y, have the same mass. The diameter of planet Y is twice that of planet X. If the acceleration due to gravity on the surface of planet X is g, then the acceleration due to gravity on the surface of planet Y will be ... A 4 49 B 1 39 Cc 1 769 D 29 (2) Copyright Reserved Please turn over

2025 June Examination 1.4 Aball is thrown vertically upwards into the air. Ignore the effects of air friction. The NET FORCE acting on the ball when the ball is at its highest point is ... A zero. B equal to the weight of the ball. Cc less than the weight of the ball. D greater than the weight of the ball. 1.5 Which ONE of the following statements is always TRUE for inelastic collisions in an isolated system? A Both momentum and kinetic energy are conserved. B Both momentum and kinetic energy are not conserved. Cc Momentum is conserved, but kinetic energy is not conserved. D Kinetic energy is conserved, but momentum not conserved. 1.6 An object moving horizontally at a constant velocity suddenly encounters a rough horizontal surface. The object continues to move over this rough surface. Which ONE of the following statements is CORRECT? The net work done on the object during the motion over the rough surface is A zero B positive Cc negative D constant 1.7 The hooter of a car emits sound of constant frequency as the car moves away from a stationary listener. Which ONE of the following properties of the sound heard by the listener will NOT change? A Speed B Frequency S Both frequency and ioudness D Both wavelength and frequency 1.8 | Two point charges, each with charge +q, are placed a distance d apart. The force experienced by each point charge has a magnitude F. The charges are now both doubled and the distance between them is halved. The magnitude of the force experienced by each point charge is ... A 2F B 4F c 8F D 16F (2) (2) (2) (2) (2) Copyright Reserved Please turn over

2025 June Examination 1.9 In the circuit shown below, the switch is open. The reading on the voltmeter Is: 100 —_t_}— 12V—— \ came | — 100 A OV B 6V Cc 12V D 0,6V (2) 4.10 In the circuit below the battery has an emf (e) and internal resistance r. With switch S open, readings are registered on the ammeter and voltmeter. Switch $ is now CLOSED. How do the readings on the ammeter and voltmeter change? AMMETER READING VOLTMETER READING A increases remains the same B increases decreases Cc decreases remains the same D decreases decreases (2) [20] Copyright Reserved Please turn over

2025 June Examination QUESTION 2 (Start on a new page) Ablock, of mass 15 kg, is pushed up an incline with a horizontal force F, as shown in the diagram beiow. The incline makes an angle of 30° with the horizontal. ] 30° The coefficient of kinetic friction between the block and the surface is 0,20. 2.1 Define the term kinetic frictional force. (2) 2.2 Draw a labelled free-body diagram showing ALL the forces acting on the block. (4) 2.3 The block moves up the plane ata CONSTANT VELOCITY. 2.3.1 State Newton's First Law of Motion in words. (2) 2.3.2 Calculate the magnitude of the force F. (6) 2.4 Asatellite that is 1000 km above the surface of the Earth is accelerating towards the Earth. If the weight of the satellite at 1000 km above the surface of the Earth is 3 800 N, calculate its weight on the surface of the Earth. (5) [19] Copyright Reserved Please turn over

2025 June Examination QUESTION 3 (Start on a new page) Aball of mass 0,5 kg is dropped from a height of 1,2 m onto a hard floor. It bounces to a maximum height of 0,8 m. The floor exerts a force of 50 N on the ball. Ignore the effects of air friction. 3.1 Write down the magnitude and direction of the force that the ball exerts on the floor. 3.2 Calculate the: 3.2.1 Velocity at which the ball strikes the floor (2) (4) 3.2.2 Time taken by the ball to reach the floor from the moment it is dropped (3) 3.2.3. Speed at which the ball bounces off the floor 3.2.4 Time that the ball is in contact with the floor (3) (4) 3.3. Sketch a graph of position versus time representing the entire motion of the ball. USE THE GROUND AS ZERO REFERENCE. Indicate the following on the graph: Height from which the ball is dropped Height reached by the ball after the bounce Time at which the ball reaches the floor Time at which the ball bounces off the floor Copyright Reserved (5) [21] Please turn over

2025 June Examination QUESTION 4 (Start on a new page) A bullet of mass 6 g is shot horizontally into a 194 g wooden block, which is at rest on a horizontal surface. The bullet hits the block with a velocity of 200 m-s" and remains stuck in the block. Ignore the effects of friction. block a 200 m:s* co 194g 4.1 State the principle of conservation of linear momentum in words. (2) 4.2 Calculate the speed of the block-builet system immediately after the bullet struck the block. (4) Immediately after the impact, the block-bullet system enters a rough section PQ, which is 5 m long, before coming to rest at Q. Pr E> a 4.3 Calculate the acceleration of the block-bullet system. (4) 4.4 Abox, of mass 60 kg, slides down a rough incline which makes an angle of 25° with the horizontal. The box experiences a constant frictional force of 180 N. 4.4.1 Draw a labelled free-body diagram showing all the forces acting on the box. (3) 4.4.2 Write down the name of the force which does zero work on the box. (1) Copyright Reserved Please turn over

2025 June Examination The box now passes point A on the incline at a speed of 4 m-s* before passing point B, which is 15 m lower down the incline. 44.3 Calculate the kinetic energy of the box as it passes point A. 4.4.4 Calculate the magnitude of the resultant force acting on the box between point A and B. 44.5 State the work-energy theorem in words. 4.4.6 Use the WORK-ENERGY THEOREM to calculate the speed of the box as it passes point B QUESTION 5 (Start on a new page) A 200 W motor operating at 85% efficiency pulls a crate of mass 90 kg up a slope at a constant speed of 1,5 m:s*t. It takes 30 s to raise the crate from point X to Y of the slope. 5.1 Define the term power. 5.2 Calculate the: 5.2.1 Energy supplied by the motor to the crate in 30 s 5.2.2 Gain in gravitational potential energy of the crate between X and Y 5.2.3 Magnitude of the frictional force acting on the crate between X and Y (3) (2) (2) (4) [25] (2) (4) (3) (5) [14] Copyright Reserved Please turn over

Physical Sciences P14 QUESTION 6 (Start on a new page) A traffic officer is sitting in a police car which is travelling at a constant velocity. The siren of the police car emits sound waves of frequency 1500 Hz. A detector that is placed on the side of the road records a frequency of 1695 Hz. The police car takes 1,5 s to reach the detector. Take the speed of sound in air as 340 m:s". 6.1 Name and state the phenomenon described above. (3) 6.2. Write down ONE medical instrument that makes use of the phenomenon in QUESTION 6.1. (1) 6.3 Calculate the distance between the police car and the detector. (5) 6.4 Draw a graph of the frequency heard by the traffic officer sitting in the police car as it moves towards and away from the detector versus time. Indicate the following on the graph: e The frequency heard by the traffic officer e Time taken by police car to reach the detector (2) [11] QUESTION 7 (Start on a new page) Three point charges, X, Y and Z, with charges of -3 uC, +6 uC and +9 uC respectively, are placed on insulated stands as shown below -3 pC +6 uC +9 uC xe Zz hs 5m oe 10 cm ! 7.1 State Coulomb's law in words. (2) 7.2 Calculate the net force acting on point charge Z. (5) 7.3 Point charges X and Y are brought into contact and then separated. Point charge X is returned to its original position, while point charge Y is removed. 7.3.1. Inwhich direction did electrons flow? Choose from X to Y or Y to X. (1) 7.3.2 Calculate the number of electrons transferred to or from point charge X. (4) 7.3.3. Point T is placed between point charges X and Z. Calculate the distance between point charges X and T where the net electric field is equal to Zero. (4) [16] Copyright Reserved Please turn over

2025 June Examination QUESTION 8 (Start on a new page) The battery in the circuit below has an emf of 12 V and internal resistance 0,30 Q. The resistance of the connecting wires and ammeter can be ignored. -O; €=12V {i]t 0,30 Q @) 80 50 49 3Q 8.1 State Ohm's law in words. (2) 8.2 Determine the: 8.2.1 Total external resistance of the circuit (3) 8.2.2 Reading on ammeter A (3) 8.2.3 Current through the 8 Q resistor (4) The voltmeter V2 with a very high resistance is now placed between points X and Y, as shown in the diagram below. 80 : 59 30 40 Y 8.3 Calculate the reading on the voltmeter V2 (4) 8.4 When the 8 © and 5 O resistors alongside point X are removed, the reading on voltmeter V1 increases. Explain this observation. (3) 8.5 The cost of energy is R2,59 per kWh. How many 80 W light bulbs can you have on for 8 hours per day if your budget for lighting is R300 per month? Assume that an average month has 30 days. (5) [24] TOTAL: [150] Copyright Reserved Please turn over

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 g 9,8 m-s? Swaartekragversnelling Universal gravitational constant G 6,67 « 10° N-m?-kg? Universele gravitasiekonstante Speed of light in a vacuum c 3,0 x 108 m-s* Spoed van lig in 'n vakuum Planck’s constant h 6,63 x 104 J-s Planck se konstante Coulomb’s constant k 9,0 x 10°N-m?:C? Coulomb se konstante Charge on electron e -1,6x 10°719C Lading op electron Electron mass me 9,11 x 101 kg Elektronmassa Mass of Earth M 5,98 « 1074 kg Massa van Aarde Radius of Earth Re 6,38 x 10®m Radius van Aarde Copyright Reserved Please turn over

2025 June Examination TABLE 2: FORMULAE / TABEL 2: FORMULES MOTION / BEWEGING Ve =Vi+aAt Ax =v, At + tat? or/of Ay = v,At + taAt? v, =v," +2aAxorofv,’ =v," +2ady Ax = (“ ae Jatonoray -(“ = Jat FORCE / KRAG Fret = ma p=mv fa") = YN fi = peN FretAt = Ap w=g Ap = mvs - mvi Gmymp2 Gm aia alae WORK, ENERGY AND POWERIARBEID, ENERGIE EN DRYWING W =FAxcos@ U=mgh or/of = £,= mgh Wher =AK orof = W.,., = AE K= zr? orlof E,=31v? = “ ‘ AK=K,-K, orfof AE, =E,-E, Wye = AK +AU or/of Wy, = AE, + AE, VV At Pave = FVave / Pgem = Fvgem WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG 7 v=fr T=— f = f=2 eet E=hf or/of E=h& viv, r E = WotEximax) Or/of E = WotKmax where/waar E = hf and/en Wo = hf and/en Exgmax)= 5 VAax orlof Kmax= 5 ™VArex Copyright Reserved Please turn over

ELECTRICITY AND MAGNETISM/ELEKTRISITEIT EN MAGNETISME R Vv emf (€) = (R +r) | emk (€) = |(R +9) R, =R, +R, + 111 q= lat —=— +— + R, R, R, W=Vq == W=Vlat P=Vi W= I?Rat P=PR Wes Mat av kQ,Q kQ — cae e-F er q q n=forn== e de Copyright Reserved