AHS 2025 PHY PRELIM P2 QP

1 Anglican High 2025 6091/02/Prelim/25 [Turn over Anglican High School Secondary Four Preliminary Examination 2025 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS 6091/02 Paper 2 Theory 26 Aug 2025 1 hour 45 min Candidates answer on the Question Paper. No additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all your work. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction tape. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. Candidates are reminded that all quantitative answers should be given to appropriate units and rounded off to the appropriate number of significant figures. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. This Question Paper consists of 22 printed pages including this cover page. 4 Marks Section A Section B s.f. error Total (80) S4 Assessment noted by : _________________________ Name of Parent/Guardian _________________________ Signature of Parent/Guardian Date : ____________________

2 Anglican High 2025 6091/02/Prelim/25 Section A Answer all questions in this section. 1 (a) The second, metre and kilogram are all SI units of base quantities. Name two other base quantities whose SI units are not stated above. 1 ………………………………………………………………… 2 ………………………………………………………………… [2] (b) (i) Circle the value for the prefix deci. 10-9 10-6 10-3 10-2 10-1 103 106 109 1012 [1] (ii) Rearrange the following prefixes in order from the largest value to the smallest value. n µ G m k ……………………………………………………………………………………………… [1] [Total: 4]

3 Anglican High 2025 6091/02/Prelim/25 [Turn over 2 A car is travelling at 30 m / s towards the East from start point A. Fig. 2.1 represents the velocity-time graph of the car for a duration of 90 s. Fig. 2.1 (a) Calculate the displacement of the car from point A at t = 90 s. displacement from point A = …………….. [2] (b) Describe the motion of the car from t = 80 s to t = 90 s. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… …………………………………………………………………………………………………... [2] [Total: 4] v / (m / s)

4 Anglican High 2025 6091/02/Prelim/25 3 Fig. 3.1 shows a load of mass 8.0 kg hanging from two strings. When the load is stationary, the tension in the string on the left is 40 N. Using a labelled vector diagram, determine the tension in the other string, T1. Fig. 3.1 Tension T1 = ……………….. [3] [Total: 3] 8.0 kg 40 N T1 30o 60o

5 Anglican High 2025 6091/02/Prelim/25 [Turn over 4 Fig. 4.1 shows a worker carrying a ladder on his shoulder. There is a bucket of weight 20 N hanging at one end of the ladder, 1.3 m away from the worker’s shoulder . The ladder has a mass of 1.6 kg, and its centre of mass is 0.85 m from the worker’s shoulder. The gravitational field strength, g is taken to be 10 N / kg. Fig. 4.1 The worker uses his hand to apply a vertical force at point X, on the ladder to keep the ladder horizontal. The horizontal distance of this force from his shoulder is 0.60 m. (a) State the principle of moments. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… …………………………………………………………………………………………………... [2] (b) Determine the force exerted by the worker at point X. force = ………………………… [2] [Total: 4] X

6 Anglican High 2025 6091/02/Prelim/25 5 In Fig. 5.1, two liquid-in-glass barometers are set up side by side at sea level using identical glass tubes. One is filled with liquid A and the other filled with liquid B. There is vacuum in the space above the liquid columns in both set-ups. Fig. 5.1 (a) Liquid B is mercury, which has a density of 13 600 kg / m3. The gravitational field strength g is taken to be 10 N / kg. Determine the density of liquid A. density of liquid A = …………………. [2] (b) Without using any additional apparatus, suggest how you can check that there is no air that is trapped at the top of any one of the inverted glass tubes, while it is at the same place. …………………………………………………………………………………………………….... ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… …………………………………………………………………………………………………... [2] [Total: 4] 20 cm 20 cm vacuum vacuum Liquid A Liquid B 120 cm 15 cm 25 cm

7 Anglican High 2025 6091/02/Prelim/25 [Turn over 6 Fig. 6.1 shows a skier of mass 75 kg skiing down a very steep smooth slope. The gravitational field strength, g is 10 N / kg. Fig. 6.1 (not to scale) The skier starts moving from the top of the slope at point T with an initial speed of 2.0 m / s. He accelerates down the slope and reaches point B at the bottom of the slope with a speed of 30 m / s. (a) (i) Calculate the change in energy in the kinetic store of the skier as he travelled from point T to point B. change in energy in kinetic store = …………………. [2] (ii) Hence, determine the height of point T from point B. height = ………………….. [1]

8 Anglican High 2025 6091/02/Prelim/25 (b) Upon reaching point B, the skier digs his skis into the snow and comes to a stop at point P after moving horizontally for 33 m. Calculate the average braking force that acts on the skier between points B and P. average braking force = …………………. [1] (c) Describe, using ideas about energy stores and transfer pathways, how energy was transferred as the skier moves from point B to point P. …………………………………………………………………………………………………….... ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… …………………………………………………………………………………………………... [2] [Total: 6]

9 Anglican High 2025 6091/02/Prelim/25 [Turn over 7 (a) Define the focal length of a converging lens. ………………………………………………….……………………………………………[1] (b) Describe briefly an experiment to determine the focal length of such a lens. You may include a diagram in your description. …………………………………..………………………….………………………………….. ……………………………………………………………………….…………………………. ……………………………………………………..…………….…………………………….. ………………………………………..………………………...……………………………[2] (c) A small object of height 4.0 cm is placed 5.0 cm away from a thin converging lens of focal length 10.0 cm. Using a suitable scale, draw a ray diagram to determine the size of the image. size = …………………. [3] (d) Other than the location and the magnification of the image, state two other characteristics of the image formed. ………………………………………..………………………………………………………[2] [Total: 8]

10 Anglican High 2025 6091/02/Prelim/25 8 Fig. 8.1 shows an electrical circuit containing two resistors. Fig. 8.1 (a) When switch S is open, the ammeter reading is zero. State the value of the potential difference across switch S. p.d.= ……………..[1] (b) Switch S is now closed. (i) Calculate the current in the ammeter. current = ……………..[2] (ii) Calculate the potential difference across the 3.0 Ω resistor. p.d.= ……………..[1] (iii) The 1.0 Ω resistor is replaced with a different resistor. The p otential difference across the 3.0 Ω resistor is now 1.5 V. Calculate the res