Technical Sciences Grade 12 P1 NW June 2025 QP (Eng)

Grade 12 PPROVINCIAL ASSESSMENT GRADE 12 TECHNICAL SCIENCES P1 JUNE 2025 MARKS: 150 TIME: 3 hours This question paper consists of 15 pages and 2 data sheets. Copyright reserved Please turn over

Technical Sciences/P1 2 NW/June 2025 Grade 12 INSTRUCTIONS AND INFORMATION 1. This question paper consists of SEVEN 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 subquestions, e.g. between QUESTION 2.1 and QUESTION 2.2. 5. You may use a non-programmable calculator. 6. You may use appropriate mathematical instruments. 7. You are advised to use the attached DATA SHEETS. 8. Show ALL formulae and substitutions in ALL calculations. 9. Round off your FINAL numerical answers to a minimum of TWO decimal places. 10. Give brief motivations, discussions, etc. where required. 11. Write neatly and legibly. Copyright reserved Please turn over

Technical Sciences/P1 3 NW/June 2025 Grade 12 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 numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 D. 1.1 … depends on the mass of the body. A Speed of an object B Inertia of a body C Acceleration of the body D Velocity of the object (2) 1.2 A man weighing 705,6 N is standing on the floor, pushing against the wall with a force of 25 N to the right, as shown in the diagram below. Which ONE is the CORRECT magnitude and direction that the wall exerts on the man? A 25 N to the left B 705,6 N to the right C 25 N to the right D 705,6 N to the left (2) Copyright reserved Please turn over

Technical Sciences/P1 4 NW/June 2025 Grade 12 1.3 Force FA is applied to pull a box to the right across a rough horizontal surface at a CONSTANT velocity v. The force diagram below shows the forces acting on the block whilst moving across the surface. Which ONE of the following represents the CORRECT relationship between the magnitudes of the horizontal forces? A FA > f B FN = Fg C FA < f D FA = f (2) 1.4 Momentum is known as the … A scalar quantity with a direction opposite to that of the velocity of the object. B product of mass and acceleration. C product of an object’s mass and its velocity. D vector quantity with a direction opposite to that of the velocity of the object. (2) 1.5 Which value of θ will result in negative work done? A 180° B 90° C 45° D 0° (2) Copyright reserved Please turn over

Technical Sciences/P1 5 NW/June 2025 Grade 12 1.6 A ball is dropped vertically downwards from a height h, ignore the effect of air resistance, which physical quantity is increasing? A Mechanical energy B Kinetic energy C Gravitational potential energy D Height (2) 1.7 Pascal (Pa) is equivalent to … A N.m B N.m2 C N.m-1 D N.m-2 (2) 1.8 The graph below shows a relationship between the stress and strain E and F respectively. Which ONE of the following is CORRECT for point E and F? POINT E POINT F A Fracture Elastic limit B Plastic region Elastic region C Elastic limit Fracture D Elastic region Plastic region (2) Copyright reserved Please turn over

Technical Sciences/P1 6 NW/June 2025 Grade 12 1.9 What happens to the speed of light when the light is moving from a more denser to a less dense medium? A speed of light decreases B speed of light increases C speed of light remains the same D speed of light deviates (2) 1.10 When a light wave with a single frequency strikes an object, a number of things could happen. Which ONE of the following is INCORRECT about what could happen to the light? A It can change colour. B It can be reflected. C It can be refracted. D It can be absorbed. (2) [20] Copyright reserved Please turn over

Technical Sciences/P1 7 NW/June 2025 Grade 12 QUESTION 2 (Start on a new page.) 2.1 Angie is pushing a car on a FRICTIONLESS horizontal surface. The mass of the car is 400 kg and is pushed with a horizontal force of 200 N to the left, as shown in the diagram below. 2.1.1 Name TWO vertical forces which are acting on the car. (2) 2.1.2 Calculate the net forces acting on the car. (3) 2.1.3 Define the term acceleration. (2) 2.1.4 Calculate the acceleration of the car. (4) 2.2 A force of 20 N is applied at an angle of 30° to the horizontal on trolley Z with a mass 10 kg which is connected to trolley X, with an unknown mass, by a light inextensible string. Trolley Z experiences a frictional force of 6 N whilst trolley X experiences a frictional force 2 N. The two trollies accelerate to the east at 2 m.s-2. 2.2.1 Define the term mass. (2) 2.2.2 Draw a labelled free-body diagram showing ALL the forces acting on trolley Z. (5) Calculate the: 2.2.3 tension in the string between trolley X and Z (4) 2.2.4 mass of trolley X (4) 2.3 State the law you used to calculate QUESTION 2.2.3 and 2.2.4. (2) [28] Copyright reserved Please turn over

Technical Sciences/P1 8 NW/June 2025 Grade 12 QUESTION 3 (Start on a new page.) 3.1 Two cars one WITH and one WITHOUT an airbag each with a mass of 1 500 kg were used in a car factory, to investigate the injuries on drivers. Graphs A and B below represent their results obtained from the investigation, as shown below. Study the graphs and answer the questions that follow. 3.1.1 Which graph represent the results of a car WITH an airbag? Write down only GRAPH A or GRAPH B. (1) 3.1.2 Explain the answer in QUESTION 3.1.1. Refer to the TIME OF CONTACT and NET FORCE. (2) 3.1.3 Define the term impulse. (2) 3.1.4 Calculate the magnitude and direction of the impulse, if car A exerts an average force of 60 kN to the right for a period of 0,01 s on the driver. (5) 3.1.5 Determine the change in momentum of car A. (2) Copyright reserved Please turn over

Technical Sciences/P1 9 NW/June 2025 Grade 12 3.2 Ball A with a mass of 10 kg was thrown due east at a velocity of viA and collided ELASTICALLY with ball B with a mass 2 kg traveling 4 m.s-1 in the opposite direction. After the collision, ball A become stationery while ball B bounces off to the east at a velocity of vfB. Ignore the effect of friction. 3.2.1 Is the system isolated? Write only YES or NO. (1) 3.2.2 Give a reason for your answer in QUESTION 3.2.1. (2) 3.2.3 Define the term elastic collision in words. (2) 3.2.4 If the total kinetic energy of the system before collision is 36 J, calculate the velocity vfB of ball B after the collision. (3) 3.2.5 State the principle of conservation of linear momentum in words. (2) 3.2.6 Calculate the velocity viA of ball A before the collision. (4) [26] Copyright reserved Please turn over

Technical Sciences/P1 10 NW/June 2025 Grade 12 QUESTION 4 (Start on a new page.) The wrecking ball of mass 1,5 ×103 kg is hanging from a crane on a cable at a height of 4 m above the ground. The crane lifts the wrecking ball with an applied force of 2 000 N at a power dissipation of 7 200 W. Ignore the mass of the cable and the effects of air friction. 4.1 Draw a labelled free-body diagram showing ALL the forces acting on the wrecking ball. (2) 4.2 Define the term work done. (2) Calculate the: 4.3 Work done by crane on the wrecking ball (3) 4.4 Average speed at which the wrecking ball is lifted (4) Copyright reserved Please turn over

Technical Sciences/P1 11 NW/June 2025 Grade 12 The wrecking ball is hanging on the crane at point A, a strong wind starts to blow and the ball swing in the direction of point B. The crane winds up the wrecking ball, and moves with a speed of 2 m⋅s-1 from point A. The ball reaches a maximum height h at point B above ground. 4.5 State the principle of conservation of mechanical energy in words. (2) Calculate the: 4.6 Mechanical energy at point A (4) 4.7 Height h from which the wrecking ball was hanging at B (4) [21] Copyright reserved Please turn over

Technical Sciences/P1 12 NW/June 2025 Grade 12 QUESTION 5 (Start on a new page.) Grade 12 learners attach two cylindrical rods X and Y to the beam, which are made from the same metal to investigate the relationship between stress and cross-sectional area. The cross-sectional area of rod Y is double the cross- sectional area of rod X. The original length of rod Y is changed by 15%. 5.1 Define the term stress. (2) 5.2 Which rod X or Y will have the larger stress? Give a reason for your response. (2) 5.3 Calculate the: 5.3.1 Cross sectional area of rod Y has a stress of 3,4 ×108 Pa (3) 5.3.2 Stress in rod X (4) 5.4 Define the term strain. (2) 5.5 Determine strain in rod Y. (1) 5.6 State Hooke’s law in words. (2) 5.7 Calculate the modulus of elasticity of rod Y. (3) [19] Copyright reserved Please turn over

Technical Sciences/P1 13 NW/June 2025 Grade 12 QUESTION 6 (Start on a new page.) 6.1 A pressure of 1,25 ×107 Pa is applied on piston 1 that has an unknown area. Output force F2 is applied on piston 2 that has an area of 0,05 m2. Study the diagram below and the answer the questions that follow. 6.1.1 Write down the magnitude of the pressure applied in piston 2. (1) 6.1.2 Name and state the principle you would use to explain the answer in QUESTION 6.1.1. (3) 6.1.3 Calculate the output force F2 that is required to lift the car in piston 2. (3) 6.1.4 Give ONE reason why liquids are preferred to be used in hydraulics. (1) 6.1.5 List ONE use of hydraulics in technology. (1) 6.2 Viscosities of WATER and OIL were observed by scientist in a laboratory. 6.2.1 Define the term viscosity. (2) 6.2.2 Which liquid will run slower? Write down only WATER or OIL. (1) 6.2.3 Explain your answer in QUESTION 6.2.2. (2) [14] Copyright reserved Please turn over

Technical Sciences/P1 14 NW/June 2025 Grade 12 QUESTION 7 (Start on a new page.) 7.1 Glass and air were used as mediums. When light ray RO is shown from medium A to medium B at an incidence angle θ, it is refracted such that the angle of refraction is 90°. Study the diagram below to answer the questions that follow. 7.1.1 Define the term refraction. (2) 7.1.2 Which medium will be air? Write down only MEDIUM A or MEDIUM B. (1) 7.1.3 Write down the size of incidence angle θ (in degrees). (2) 7.1.4 What is the name of incidence angle calculated in QUESTION 7.1.3? (1) Medium A is now replaced with a vacuum, which is medium C such that the angle θ is now decreased. 7.1.5 What will be observed in the new path of ray OQ? Write down only THE LIGHT RAY WILL BEND TOWARDS THE NORMAL or THE LIGHT RAY BEND AWAY FROM THE NORMAL. (2) 7.1.6 Explain your answer in QUESTION 7.1.5. (1) 7.2 Define the term electromagnetic wave. (2) 7.3 Identify the TYPE of electromagnetic wave that is applicable to the function from the table below. VISIBLE LIGHT GAMMA RAY 7.3.1 For eyesight (1) 7.3.2 For treatment of cancer (1) Copyright reserved Please turn over

Technical Sciences/P1 15 NW/June 2025 Grade 12 7.4 Given that the frequency of a radio wave is 300 GHz. 7.4.1 Define the term photon in words. (2) 7.4.2 Calculate the energy of the photon. (3) 7.4.3 Calculate the wavelength of the photon. (4) [22] TOTAL: 150 Copyright reserved

Technical Sciences/P1 1 NW/June 2025 Grade 12 DATA FOR TECHNICAL SCIENCES GRADE 12 PAPER 1 GEGEWENS VIR TEGNIESE WETENSKAPPE GRAAD 12 VRAESTEL 1 TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Acceleration due to gravity g 9,8 m·s-2 Swaartekragversnelling Speed of light in a vacuum c 3×108 m.s-1 Spoed van lig in ʼn vakuum Planck's constant h 6,63×10-34 J.s Planck se konstante TABLE 2: FORMULAE/TABEL 2: FORMULES FORCE/KRAG Fnet = ma p = mv fsmax = μs N fk = μ k N Fnet ∆t = ∆p Fg = mg ∆p = mvf − mvi WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING W = F∆x cos θ U = mgh or/of EP = mgh K = ½mv 2 or/of Ek = ½mv 2 ME = Ek + Ep Pave = Fvave P= W ∆t Copyright reserved Please turn over

Technical Sciences/P1 2 NW/June 2025 Grade 12 ELASTICITY, VISCOSITY AND HYDRAULICS/ELASTISITEIT, VISKOSITEIT EN HIDROULIKA F ∆ℓ σ= 𝜀= A L σ F1 F2 K= = ε A1 A2 P= F P = ρgh A WAVES, SOUND AND LIGHT/ GOLWE, KLANK EN LIG v=fλ T= 1 f c E = hf or/of E=h λ Copyright reserved