2025 CHIJ SEC (TP) Physics Prelim Paper 2 QP

This document consists of 22 printed pages and 2 blank pages. Name: ( ) Class: WHITLEY SECONDARY SCHOOL A Caring and Learning Community of Leaders Perseverance * Respect * Integrity * Discipline *Empathy PRELIMINARY EXAMINATION 2025 READ THESE INSTRUCTIONS FIRST Write your index number and name on all the work you hand in. 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. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer only one question. Write your answers in the spaces provided. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. 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. The number of marks is given in brackets [ ] at the end of each question or part question. SUBJECT : PHYSICS PAPER 2 (6091/02) LEVEL : Sec 4 G3 DATE : 29 August 2025 DURATION : 1 hr 45 mins SETTER : Mr Krishan Sanjay VETTER : Ms Keira Htay For Examiner’s Use Section A / 70 Section B / 10 Total / 80

2 Section A Answer all the questions in this section. 1 Fig. 1.1 shows a rocket just after its launch. At its launch, the rocket and its contents have a total mass of 1.2 x 10 5 kg. Fig. 1.2 shows how the upward thrust on the rocket changes with time in the first 40 s after the launch. The gravitational field strength g is 10 N/kg. (a) Calculate the weight of the rocket just before its launch. weight = ………………………… [1] (b) At the point of launching, the rocket does not take off immediately. State the time when the rocket starts to take off and explain your answer. ……………………………………………………………………………………………. ……………………………………………………………………………………………. ……………………………………………………………………………………………. [2]

3 (c) Calculate the acceleration of the rocket at t = 30 s. acceleration = ………………………… [2] (d) 30 s after launch, the total weight of the rocket and its content decreases significantly as fuel is being burnt off while the thrust remains the same. Describe the motion of the rocket after 30 s. ……………………………………………………………………………………………. ……………………………………………………………………………………………. [1] 2 Fig. 2.1 shows an electric kettle and the live, neutral and earth wires of a household electricity supply. The kettle has a power rating of 2.0 kW. The supply voltage is 240 V. (a) Complete Fig. 2.1 to show how the kettle should be connected to the supply. Include a switch and a fuse in your drawing. Fig. 2.1 [2]

4 (b) The live wire becomes loose and touches the metal case. Explain why a person who la