HCI 2024 H2 Physics Paper 4 Question Paper

This paper consists of 24 printed pages, including 3 BLANK pages. HWA CHONG INSTITUTION C2 Preliminary Examination Higher 2 CANDIDATE NAME CT GROUP 23S TUTOR NAME PHYSICS Paper 4 Practical Candidates answer on the Question Paper. No Additional Materials are required. 9749/04 22 August 2024 2 hours 30 mins INSTRUCTIONS TO CANDIDATES Write your name, CT group and tutor’s name in the boxes at the top of this page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. Answer all questions. You will be allowed a maximum of one hour to work with the apparatus for Questions 1 and 2, and a maximum of one hour for Question 3. You are advised to spend approximately 30 minutes on Question 4. Write your answers in the spaces provided on the question paper. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Give details of the practical shift and laboratory, where appropriate, in the boxes provided. At the end of the examination, submit sets A, B and C separately. The number of marks is given in brackets [ ] at the end of each question or part question. Shift Laboratory For Examiner’s Use 1 / 12 2 / 9 3 / 22 4 / 12 Total / 55 A

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3 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 1 In this experiment, you will investigate the period of torsional oscillations of a suspended disc with loaded mass. (a) Set up the apparatus as shown in Fig. 1.1. Fig. 1.1 Disc A and disc B have three small holes spaced at regular intervals near the edge. Pieces of string have been threaded through the holes. Clamp disc B horizontally using two small blocks of wood. Use the clips on disc B to adjust the length l of each string until l is about 100 cm. Place a 50 g mass in the centre of disc A. clips l stand disc B disc A

4 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 (b) (i) (ii) Gently rotate disc A through a small angular displacement and release it so that the disc performs torsional oscillations of period T in a horizontal plane as shown in Fig. 1.2. Determine and record T. T = ……………………………………………….. [2] Repeat (b)(i) for different values of mass m, by stacking the slotted masses on top of each other, until you have five sets of readings of T and m. Present your results clearly. [4] Top View 50 g mass disc A Fig. 1.2

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6 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 (c) It is suggested that T and m are related by the expression: = nT km where k and n are constants. Plot a suitable graph to determine the values of k and n. k = …………………………………………. n = …………………………………………. [6] [Total: 12]

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8 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 2 In this experiment, you will investigate the energy stored in a stretched rubber band. (a) (i) Place the rubber band on the bench so that it is taut without being stretched, as shown in Fig. 2.1. The length of the rubber band is 0.L Fig. 2.1 Measure and record 0L for your rubber band. 0L = …………………………………………. [1] (ii) Use the dimensions given on the card to calculate the volume V of the rubber band. V = …………………………………………… [1]

9 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 F = …………………………………………… N [1] (b) (i) Set up the apparatus as shown in Fig. 2.2 with the mass hanger suspended from the rubber band. Fig. 2.2 The extended length of the rubber band is L. Calculate the extension e of the rubber band where: 0 = - .e L L Record your answer in metres. e = ……………………………………… m The force F acting on the rubber band is given by: F = mg Where m is the mass, in kg, suspended from the rubber band and g = 9.81 N kg-1. Calculate and record F. [Total:8]

10 Hwa Chong Institution 9749 / 04 / C2 Preliminary Examination 2024 (ii) (iii) Vary m and repeat (b)(i). Present your results clearly. [3] Plot your results on the grid below. [Total:8] F / N e / m [1]