Physical Sciences Grade 12 P1 Limpopo June 2025 QP

Physical Sciences Pre-June P1 NSC Vhembe West/2024 REPUBLIC OF SOUTH AFRICA GEPARTMENT OF EDUCATION [ VHEMBE WEST DISTRICT | NATIONAL SENIOR CERTIFICATE MARKS: 150 TIME: 3 HOURS This question paper consists of 19 pages. Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 INSTRUCTIONS AND INFORMATION 1 Write yourname and grade on the ANSWER SHEET provided. 2 This question paper consists of 9 questions. Answer ALL the questions. 3. StartEACH question on a NEW page in the ANSWER SHEET. 4 — Number the answers correctly according to the numbering system used in this question paper. 5 Leave ONE line between two subquestions, e.g. between QUESTION 2.1 and QUESTION 2.2. 6 You may use a no-programrable calculator. 7 You may use appropriate mathematical instruments. 8 ShowALL formulae and substitutions in ALL calculations. 9 Round off your final numerical answers to a minmum of TWO decimal places. 10 Give brief motivations, discussions, etc, where required. 11 You are advised to use the attached DATA SHEETS. 12 Write neatly and legibly PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 1 (MULTIPLE-CHOICE QUESTIONS) Various options are provided as answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A — D) next to the question numbers (1.1 - 1,10) in the ANSWER SHEET provided. 1.1 Two forces, Fi and F2, are applied on a box lying on a frictionless surface as shown below. The magnitude of F1 is greater than that of F2. F, F, —— ——s The box will... A accelerate towards the left B accelerate towards the right. C move ata constant speed towards the right D move ata constant speed towards the left. (2) 12 A5kgiron shot putt and a 10 kg shot putt, with the same diameter, fall freely from the shelf that is 12 m above the ground. Ignore the effects of air friction. When the shot putts are 3 m above the ground, they have the same ... A momentum B acceleration C potential energy D kinetic energy (2) 1.3 Twoasteroids, S and T, having masses of Mand 2M respectively, are on course for a collision. S T If the magnitude of the acceleration on asteroid $ is a, then the magnitude of the acceleration on asteroid T is: A-a aie 3 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 14 15 16 a gein B ie D 2a A sound source approaches a stationary observer at a CONSTANT VELOCITY. Which of the following describes the observed wavelength and frequency from the sound source as it approaches? (2) OBSERVED WAVELENGTH OBSERVED FREQUENCY A Greater than Greater than B Less than Less than C Greater than Less Than D Less than Greater than (2) Two objects, mand mea distance r apart, experiences a gravitational force F. The mass of mi is now doubled and the distance is halved. The gravitational force between mn and me is now: AF 8 BF 2 CF D 8F (2) An object is thrown vertically downwards towards the ground from a height h, with a velocity v. The object strikes the ground and bounces upwards. It is caught when it reaches its maximum height after the bounce. Which of the following graphs for velocity versus time best represents the motion of the object? A B ry LA E £ : 7 ‘ ‘ t(s) (54 D 4 E £E i 7 H t(s) ’ | (2) PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 17 18 19 A crate is pulled up a slope. Which of the forces will do zero work on the crate? A pulling force. B Normal force C Frictional force D Gravitational force (2) The magnitudes of electric fields generated by different point charges are measured at a fixed point. For each measurement, the distance between this fixed point and the charges are the same. Which ONE of the following sketch graphs CORRECTLY shows the relationship between the magnitude of the electric field (E) and the magnitude of the charge (Q)? A E44 BCE 4 2 Q 9 Q CEs DoE 0 07 Q Q (2) A positively charged object has ... A fewer electrons than neutrons. B fewer protons than neutrons. C fewer electrons than protons. D more protons than neutrons (2) PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 1.10 The diagram below represents a circuit in which all the extemal resistors have the same resistance. r Which ONE of the ammeters in the circuit will have the LOWEST reading? AA B Az C A3 DAs (2) 6 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 2 (FORCES) (Start on a NEW page) 2. Block M, 10 kg, is connected to block m, 2 kg, with a rope, T, of negligible mass, over a frictionless pulley. Both blpcks are at rest. The slope makes an angle of 30° with the horizontal. Friction on the slope cannot be ignored. m=2kg 2.1 Define the term normal force. 2.2 Drawa labelled free-body diagram of all forces acting on the 2 kg mass. 2.3 Calculate the frictional force needed to keep the blocks at rest. 2.4 The rope snaps above mass m, causing block Mto slide down the slope, and block m to fall to the ground. The kinetic frictional force between the block and the slope is 25 N. Ignore the mass of the rope T. M=10 kg al | m=2kg aN 2.4.1 Drawa free-body diagram of all the forces acting on the mass M. 2.4.2 Calculate the magnitude of acceleration of mass M 2.5 Block mtakes 0,5 s to reach the ground. 2.5.1 Calculate the final velocity of block m. 2.5.2 How would the final velocity of m be affected if the mass was doubled and it is dropped from the same height? Write only INCREASE, DECREASE or REMAIN THE SAME. Explain the answer. 7 PTO Copyright recersved (2) (2) (5) (3) (4) (3) (3)

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 3 (FORCES) (Start on a NEW page) 3. The Curiosity rover dropped from 125 km above the surface of Mars. The mass of the Curiosity rover is 899 kg and the mass of Mars is 6,42 x 1023 kg. The radius of mass is 53,25% thatof the Earth. Curiosity 099 ing A 125 km Mars 642 x 10" ky 3.1 State Newton’s Law of Universal Gravitation in words. (2) 3.2 Calculate the weight of the Curiosity on Earth. (2) 3.3 Calculate the gravitational acceleration on Mars. (4) 3.4 Would the mass of the Curiosity be different on Mars than on Earth? Choose fromYES or NO. Give a reason for the answer. (2) [10] 8 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 4 (VERTICAL PROJ ECTILE MOTION) (Start on NEW page) 41 42 43 A hot-air balloon moves vertically downwards at a constant velocity of 3,4 m.s7, When the balloon is 15 m above the ground, a small ball is dropped from balloon. Refer to the diagram below. v=3,4ms" | h=15m —L______. ground The ball strikes the ground and bounces vertically upwards. The hot-air balloon continues to move downwards at the same constant velocity. Ignore the effects of air friction acting on the ball. Define the term free fall in words. (2) The sketch graph below (not drawn to scale) represents the positions of the ball relative to the ground from the time the ball is dropped until the time it reaches its maximum height after the first bounce. Time (s) Position (m) Oo tite ts -15 Was the ball in free fall between ti and t seconds? Write down either YES or NO. (1) Use only EQUATIONS OF MOTION to calculate: 4.3.1 The value of t: indicated on the graph. (3) PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 4.3.2 The value of the hot-air balloon above the at the instant when the ball struck the ground. (4) 4.4 The ball was in contact with the ground for 0,2 s and left the ground with a vertical upward velocity of 7,2 ms“. Use only EQUATIONS OF MOTION to calculate the value of ts indicated on the graph. (4) [14] 10 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 5 (MOMENTUM AND IMPULSE) (Start on a NEW page) Two trolleys A and B of mass 3,2 kg and 2,6 kg respectively are held at rest on a straight horizontal, frictionless track, with a compressed spring between them, as shown in the diagram below. Before the spring is released A B [ Track Compressed spring After the trolleys are released, the spring extends to its natural length and the falls onto the track. Trolley A now moves with a constant velocity of 0,4 m.s“2 to the left, while trolley B moves with a constant unknown velocity to the right. Trolley B reaches the end of the track after 1,3 s. ; After the spring is released 04ms > A B __ Py i om 5.1 State the principle of conservation of linear momentum in words. (2) 5.2 Calculate the distance travelled by the trolley B in 1,3 s. (5) The average force exerted by the extended spring on each trolley while they were in contact with the spring was 4,2 N. 5.3 Calculate the time it took the spring to extend to ist natural length. (3) 5.4 Trolley B is now replaced by trolley C, which has a larger mass. The same compressed spring is placed between trolleys A and C. The trolleys are then rekeased. The average force exerted by the extended spring on the trolleys remains 2,4 N for the same period of time as calculated in QUESTION 5.3. How does the magnitude of the average velocity of trolley C compare to the magnitude of the velocity of trolley B after the spring has fallen to the track? Write only GREATER THAN, LESS THAN or EQUAL TO. (3) Explain the answer 11 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 6 (WORK, ENERGY AND POWER) (Start on a NEW page) 6.1 6.2 6.3 6.4 6.5 12 A block of mass 800 gmoves under the influence of a force of 0,30 N. Whem the block reaches a velocity of 1,2 m.s", it eneters a rough surface. The block experiences a constant frictional force of 0,86 N as it moves from point P to point Q as shown below causing its speed to decrease to 0,2 m.s*! after a displacement, Ax. direction of motion —> 0,3N 0,3N we hams? < > ! Ax l I I P Q State the work-energy theorem in words. (2) Draw a labelled free-body diagram showing all the forces acting on the block as it moves across the rough surface. (4) Determine the net force acting on the block as it moves across the surface. (3) Use Energy Principles to calculate the displacement, Ax, of the block. (4) NAME ONE non-conservative force acting on the block as it moves across the surface. (1) PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 7 (DOPPLER EFFECT) (Start on a NEW page) An observer walks at a constant velocity towards a stationary sound source that emits sound at a frequency of 2 450 Hz. The frequency detected by the observer as she approaches the sound source is 2 500 Hz. 7.1 State the Doppler effect in words. (2) 7.2 Explain in terms of wave motion why the detected frequency is higher than the emitted frequency. (3) 7.3 Calculate the speed of the observeras it approaches the sound source. Take the speed of sound in air as 340 m.s"}. (5) 7.4 How would the wavelength of the sound wave emitted by the source change in the following scenarios? Write down only INCREASE, DECREASE or STAY THE SAME. When the observer: 7.4.1 Stands next to the sound source. (1) 7.4.2. Moves away from the sound source. (1) 7.5 The observer decides to run towards the direction of the sound source ata higher constant speed than the speed calculated in QUESTION 7.3. How will this affect the following? Write down only INCREASES, DECREASES or STAYS THE SAME. 7.5.1 Detected frequency. (1) 7.5.2 The speed of sound. (1) 75.3 The emitted frequency from the sound source. (1) 7.6 Give TWO applications of the Doppler effect in the medical field. (2) [17] 13 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 8 (ELECTROSTATICS) (Start on a NEW page) Point A and point B are 0,04 m apart, as shown below. (the sketch is not drawn to scale). Sphere X lies 0,01 m from point A. Sphere X has 1 238 electrons removed from the surface. 0,04 « ~ * ¢ 001m C 4 A xX B 8.1 Whats the nature of the charge on sphere X? Choose either POSITIVE or NEGATIVE. (1) 8.2 Calculate the magnitude of the charge on sphere X. (3) 8.3 Define the term electric field. (2) 8.4 Draw the netelectric field pattern for two identical spheres with opposite charge. (3) 8.5 At what point, A or B, is the magnitude of the electric field, due to charged sphere X, is greater? Explain the answer. (3) 8.6 Calculate the electri fiwld of sphere X at point B if sphere X is replaced with a charge of -2 x 10°C. (3) 8.7 Anegative point charge Y with a charge of -2,8 nC is NOW placed at point B, and a point charge Z with a charge of +3,2 nC is placed at point A. 8.7.1 Draw a vector diagram to show the direction of the forceon charge X because of charges Y and Z. (2) 8.7.2 Calculate the net electrostatic force on shpere X because of charges Y and Z. (5) (22] 14 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 QUESTION 9 (ELECTRIC CIRCUITS) (Start on a NEW page) In the circuit diagram below, resistor R, with a resistance of 5,6 Q, is connected, together with a switch, an ammeter and a high-resistance voltmeter, to a battery with an unknown intemal resistance, r. The resistance of the connecting wires and the ammeter may be ignored. @) 56.0 of RTs Thegraph below shows the potential difference across the terminals of the battery as a function of time . At time ti, switch S is closed. 4 Pa 4 CL) A |) one —__ g i e @ i] a i ti time (s) 15 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 9.1 Define the term emf of a battery. (2) 9.2 Write down the value of the emf of the battery/ (1) 9.3 When the switch S is CLOSED, calculate the: 9.3.1 Current through resistor R. (3) 9.3.2 Power dissipated in resistor R (3) 9.3.3 Internal resistance, r, of the battery (3) 9.4 Two IDENTICAL resistors, each with resistance X, are now connected in the same circuit with switch S closed, as shown below. 5,60 The ammeter reading now increases to 4 A. 9.4.1 How would the voltmeter reading change? Choose from INCREASES, DECREASES or REMAINS THE SAME. (1) 9.4.2 Calculate resistance X. (5) [18] TOTAL = 150 16 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 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 dead geiliciinedan 6 6.67 x10" Nm? kg? ulin nada Re atid porecirhieg M, 5,98 x 10" kg mane h 6,63x 10" J's net tate k 9.0.x 10°Nm?-C? fan aaron e 4,8x 10°C ee m, 9.11.10" kg 17 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC Vhembe West/2024 TABLE 2: FORMULAE/TABEL 2: FORMULES MOTIONIBEWEGING v= vj at Ax =v dt gan? orfaf dy =v it + pan? : Vv, *V, ) vi eM, | Vv, =v, + 2anx arlofy,) =v) + 2aay ax -| —— |v oriat ty -| “ |ae FORCE/KRAG F.-ma p=mw 4" =y,N f_=y,N F_At =Ap Ap= mv. my. wamg mm, my | = F=G ry oref F=G a o- Ga ovef g= Ge WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING W =FAxcos 8 U=mgh orof = E,=mgh W-aK oof Wo -AE, AK-K,-K oof AE -E, -E, Wy. AKAD otfof Wi. = AE, + AE, pw A Pre = Fie | Posrne = Fgeris WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG 12 T : ee 7 wiv viv, ale OY cml he ‘ vive A vv," E-nhf orlof are E=W,*E,,., oofE=W,+K,,, wherelwaar E-hf andian W, hf, andien E.. = 5m orlof K., = 3 on 18 PTO Copyright recersved

Physical Sciences Pre-June P1 NSC ELECTROSTATICS/ELEKTROSTATIKA an ee a tame run a gq ra | we aa orl of n rs ELECTRIC CIRCUITS/ELEKTRIESE STROOMBANE v emf (e)= WR + rp i-= t emk (t)=(R +1) R, =R, +R, + a q=in R, R, R, We=V¥o Ww ee a WeViat s PeVI WePRat vt P-FR WW: y' Pc 2 R ALTERNATING CURRENTIWISSELSTROOM Paw Veewben | Pyericota™ Vags las Vv, Vea= t v= ve ve = ih =a Ele a 1 OP = 19 PTO Vhembe West/2024 Copyright recersved