AES Prelim P2

Name: ....................................................... ( ) This Question Paper consists of 20 printed pages including this page. [Turn over ASSUMPTION ENGLISH SCHOOL PRELIMINARY EXAMINATION 2024 PHYSICS 6091 / 02 ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL LEVEL: Sec 4 Express DATE: 23 August 2024 CLASS: Sec 4/1 DURATION: 1 hour 45 minutes Additional Materials provided: - INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your NAME and INDEX NUMBER at the top of this page. SECTION A (70 marks) STRUCTURED QUESTIONS Answer all questions. Write your answers in the spaces provided on the question paper. SECTION B (10 marks) FREE-RESPONSE QUESTIONS Answer one question. Write your answers in the spaces provided on the question paper. For Examiner’s Use Paper 1 40 Paper 2 Section A 70 Paper 2 Section B 10 Paper 3 40 Total % 100 At the end of the examination, hand in this question booklet.

2 6091/4E/PRELIM/24 SECTION B – STRUCTURED QUESTIONS (70 marks) Answer all the questions in the spaces provided. 1 Fig 1.1 shows the speed-time graph of the object moving across a surface in a straight line. Fig 1.1 (a) (i) State a difference between speed and velocity. …………………………………………………………………………….. …………………………………………………………………………….. [1] (ii) Calculate the deceleration of the object at t = 25 s. deceleration = ……………… [2] 70 60 50 40 30 20 10 time / s speed / m/s

3 6091 /4E/PRELIM/24 [Turn Over (b) (i) On Fig. 1.1, mark a point D when the object has increasing deceleration. [1] (ii) Using ideas about forces, explain why the object begins to slow down from 10 s. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. [2] 2 A ladder of weight 30 N is fixed to a wall at L. The weight of the ladder acts through the mid-point of the ladder. The wall exerts a horizontal force FH and a vertical force FV on the ladder at L. (a) (i) State what is meant by the moment of force. …………………………………………………………………………….. …………………………………………………………………………….. [1] (ii) Calculate the clockwise moment about O. clockwise moments = ……………… [2] 90 cm 100 cm L 30 N O FV FH

4 6091/4E/PRELIM/24 (b) A man on the ground begins to climb the ladder. (i) State how the clockwise moments about point O change, if at all, as the man moves up the ramp. Explain your answer. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. [2] (ii) Suggest a point on the diagram, at which another force must act on the ramp. …………………………………………………………………………….. [1] (iii) By considering moments about L, explain why this other force is necessary. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. [2]

5 6091 /4E/PRELIM/24 [Turn Over 3 A syringe contains trapped air, as shown in Fig. 3.1. The piston inside the syringe is free to move up and down in the syringe. When the syringe is placed in hot water, the piston moves upwards as shown in Fig. 3.2. (a) Explain, in terms of molecules, (i) why the air inside the syringe exerts a pressure on the piston, …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. [2] (ii) how pressure in the syringe change when it is placed in hot water. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. …………………………………………………………………………….. [2] (b) Explain why hot water evaporates faster than cool water. …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… [2] piston seal air piston air seal hot water Fig. 3.1 Fig. 3.2

6 6091/4E/PRELIM/24 (c) Some ice is added to the hot water. Describe the change in the internal stores of the ice during melting. …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… [2] 4 A rope is being displaced vertically at a frequency of 2.5 Hz. The displacement- distance wave of the rope is shown in Fig. 4.1. The wave is moving towards the right. Fig. 4.1 (a) For each statement, write T for true or F for false. T or F (i) The wave has an amplitude of 3.0 cm. (ii) The particle at X is moving upwards at the next instant. (iii) The speed of the wave is 15 m/s. (iv) Each wave takes 0.4 s to complete. [2] (b) State a difference between the wave formed by the rope and ultrasound. …………………………………………………………………………………… …………………………………………………………………………………… [1] displacement / cm 2.0 – 2.0 X distance / cm 1.0 2.0 3.0 4.0 5.0 6.0 7.0

7 6091 /4E/PRELIM/24 [Turn Over 5 A periscope is used in a submarine to view object O above the water surface. One type consists of two triangular prisms that are fixed at each end of the periscope. Each prism has angles of 90° and 45°. The critical angle of light in the glass is 42°. The image of the object is viewed at E. (a) A ray from the top of object O enters the top prism without bending. Explain. …………………………………………………………………………………… …………………………………………………………………………………… [1] (b) State two reasons why light is reflected inside each prism. 1:………………………………………………………………………………… …………………………………………………………………………………… 2:………………………………………………………………………………… …………………………………………………………………………………… [2] (c) Determine the refractive index of glass. refractive index = ……………… [2] prism object O E water

8 6091/4E/PRELIM/24 6 A battery of electromotive force 4.5 V is connected to two filament lamps M and N and a resistor R. The I-V characteristics of the filament lamps are shown in Fig. 6.1. Fig. 6.1 (a) Using Fig. 6.1, explain which filament lamp has a greater resistance given that the potential difference across the two lamps is the same. …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… [2] M N M N R

9 6091 /4E/PRELIM/24 [Turn Over (b) The two filaments are made from the same type of metal. They both operate at the same temperature. Suggest why one filament could have a resistance greater than that of the other filament. …………………………………………………………………………………… …………………………………………………………………………………… [1] (c) Given that current flowing in M is 0.15 A, calculate (i) the current flowing in the battery, current = ……………… [1] (ii) the charge flowing through the battery in 10 minutes. charge = ……………… [2]

10 6091/4E/PRELIM/24 7 An electric motor is used