2023 ACSBR Phy Prelims P2

Name: Class: Class Index No.: Anglo-Chinese School (Barker Road) PRELIMINARY EXAMINATION 2023 SECONDARY FOUR EXPRESS PHYSICS 6091 PAPER 2 TIME: 1 HOUR 45 MINUTES READ THESE INSTRUCTIONS FIRST Write your name, class & exam index number in the box provided at the top of this page. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use glue or correction fluid. Section A Answer all questions. Section B Answer all questions. Question 13 has a choice of parts to answer. 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 the sound use of Physics than correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. This question paper consists of 24 printed pages. For Examiner’s Use Section A Section B Total / 80

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 2 Secondary 4 Express Physics 6091/02 SECTION A (50 marks) Answer all the questions in this section. 1 Fig. 1.1 shows a 58 g ball being thrown vertically upwa rds from the top of a building with an initial velocity of 20 m/s. It reaches the highest point and begins to fall. It lands on the ground when time is 6.0 s. The velocity-time graph is shown in Fig. 1.2. Air resistance is negligible. (a) Explain how Fig. 1.2 shows that the ball is moving in the opposite direction after a period of time. ……………………………………………………………………………................................. ……………………………………………………………………………................................. [1] (b) Determine the time t for the ball to reach its highest point. t = ………………………… [1] (c) Calculate the velocity v of the ball just before it touches the ground. v = ………………………… [1]

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 3 Secondary 4 Express Physics 6091/02 (d) Calculate the height h of the building. h = ………………………… [2]

Anglo-Chinese School (Barker Road) Preliminary Examination 2023 4 Secondary 4 Express Physics 6091/02 2 Fig. 2.1 shows a car being lifted by two ropes . Th e car remains horizontal and moves vertically upwards at a constant speed. Fig. 2.1 The weight of the car is 18 000 N and the tension s in rope 1 and rope 2 are T 1 and T 2 respectively. (a) State the two conditions for the car to be in a state of eq