DHS 2024 Prelim Phy P4

1 © DHS 2024 9749/04 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H2 PHYSICS Paper 4 Practical Candidates answer on the Question Paper. 9749/04 22 August 2024 2 hours 30 minutes READ THESE INSTRUCTIONS FIRST Write your centre number, index number, name and class at the top of this page. Give details of the practical shift and laboratory where appropriate, in the boxes provided. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions 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. 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. Shift Laboratory For Examiner’s Use 1 12 2 9 3 22 4 12 Total 55 This document consists of 20 printed pages.

2 2024/DHS/Prelim/9749/04 1 In this experiment, you will investigate the motion of a system of masses. (a) Tie two 50 g slotted masses to the string as shown in Fig. 1.1 to create a pendulum. Fig. 1.1 (b) Set up the apparatus as shown in Fig. 1.2 with the pendulum created in (a). Fig. 1.2 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 = ………......................................... stand slotted masses bench x clamp split cork boss 10 cm 25 cm knots continuous string knot

3 2024/DHS/Prelim/9749/04 [Turn over 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] (c) Vary x and repeat (b). Present your results clearly. [4] (d) 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 2024/DHS/Prelim/9749/04 [Total: 12]

5 2024/DHS/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 width, thickness and length of the rubber band are w, t and L0 respectively. Fig. 2.1 Measure and record w, t and L0 for your rubber band. w = ………................................... t = ………................................... L0 = ………................................... [1] (ii) Calculate the volume V of the rubber band. V = ………................................... [1] L0 t w

6 2024/DHS/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 2024/DHS/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 2024/DHS/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 2024/DHS/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 DY, as shown in Fig. 3.1. The diameter of the wire is dY. Fig. 3.1 Measure and record DY and dY. DY = .............................................. cm dY = ............................................ mm [2] cardboard tube wire DY

10 2024/DHS/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 for LY. percentage uncertainty in LY = ........................................... ........... [1]