2023 JPJC Prelim H2 Phy P4

2023/JPJC/Prelim/9749/04 [Turn over JURONG PIONEER JUNIOR COLLEGE JC2 Preliminary Examination PHYSICS 9749/04 Higher 2 Paper 4 Practical 17 August 2023 2 hours 30 minutes READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. 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. Shift Laboratory This document consists of 18 printed pages and 2 blank pages. Name Class Index Number For Examiner’s Use 1 / 12 2 / 9 3 / 22 4 / 12 Total / 55 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 questi on 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, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.

2 2023/JPJC/Prelim/9749/04 1 In this experiment, you will investigate the motion of a system of masses. (a) Set up the apparatus as shown in Fig. 1.1. Fig. 1.1 The distance between the bottom of the split cork and the top of the upper string loop is x. Adjust the apparatus until x is approximately 15 cm. Measure and record x. x = ………......................................... Move the bottom mass a short distance to the left and release it. The masses will oscillate with a period T. Determine and record T. T = ………........................................ [2] stand boss clamp split cork slotted masses bench x

3 2023/JPJC/Prelim/9749/04 [Turn over (b) Vary x and repeat (a). Present your results clearly. [4] (c) T and x are related by the expression: T4 = Px + Q where P and Q are constants. Plot a suitable graph to determine P and Q. P = ………......................................... Q = ………......................................... [6]

4 2023/JPJC/Prelim/9749/04 [Total: 12]

5 2023/JPJC/Prelim/9749/04 [Turn over 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 L0. Fig 2.1 Measure and record L0 for your rubber band. L0 = ………................................... [1] (ii) Use the dimensions given on the card to calculate the volume V of the rubber band. V = ………................................... [1] L0

6 2023/JPJC/Prelim/9749/04 (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: e = L − L0. 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. F = …………................................. N [1] mass hanger rod of clamp rubber band stand mass hanger bench boss L

7 2023/JPJC/Prelim/9749/04 [Turn over (ii) Vary m and repeat (b)(i). Present your results clearly. [3] (iii) Plot your results on the grid below. [1] e / m F / N

8 2023/JPJC/Prelim/9749/04 (iv)The area under the graph represents the approximate energy stored by the rubber band. Estimate this energy when its extended length L = 2L0. energy stored = ……..................................... J [1] (v) Calculate the energy stored per unit volume, in J m−3, in the rubber band when its extended length L = 2L0. energy stored per unit volume = …................................... J m−3 [1] [Total: 9]

9 2023/JPJC/Prelim/9749/04 [Turn over 3 This experiment investigates the properties of a coil of wire. (a) You have been provided with two cardboard tubes with wire wrapped around them. The diameter of the tube labelled Y is D Y, as shown in Fig. 3.1. The diameter of the wire is dY. Fig. 3.1 Measure and record D Y and dY. DY = .............................................. cm dY = ............................................ mm [2] cardboard tube wire DY

10 2023/JPJC/Prelim/9749/04 (b) (i) The total length of wire is LY. Estimate and record your value for LY. Show your working. LY = .............................................. cm [2] (ii) Estimate the percentage uncertainty in your value of LY. percentage uncertainty in LY = ...................................................... [1]