Boon Lay Prelim P2

BOON LAY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 Name ( ) Class Subject : PHYSICS Paper No : 2 Subject Code : 6091/02 Level : SECONDARY FOUR EXPRESS Date/Day : 23 AUGUST 2023 (FRIDAY) Time : 1030 – 1215 Duration : 1 HOUR 45 MINUTES 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 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. This question paper consists of 17 printed pages.

2 BLS/Prelims/2024/4E/Physics/6091/02 Section A Answer all questions. 1 Fig. 1.1 shows a container ship dragging its anchor in the sea while sailing forward. The anchor has a mass of 3000 kg and is made of cast-iron (density = 6900 kg m-3). (a) The density of sea water is 1020 kg m-3. Calculate the mass of sea water displaced by the anchor when it is in the sea. mass of sea water displaced by the anchor = …………………………………. [2] (b) The anchor experiences a horizontal drag force of 40 kN while sailing. By means of a scaled vector drawing, determine the tension, T, on the chain pulling the anchor. scale: …………………………… tension, T = ........................................................... [3] [Total: 5] Fig. 1.1

3 BLS/Prelims/2024/4E/Physics/6091/02 2 The autonomous robot shown in Fig. 2.1 is travelling in a straight line. Fig. 2.2 shows the velocity-time graph of the robot over a 10 s period. (a) Complete the displacement-time graph for the same robot on Fig. 2.2. Include labels for appropriate points. [3] (b) Calculate the acceleration of the robot between 4 s to 8 s. acceleration = ........................................................... [1] Fig. 2.2 Fig. 2.1

4 BLS/Prelims/2024/4E/Physics/6091/02 (c) Fig. 2.3 shows the path of the robot as it navigates a right turn. The robot moves at a constant speed of 2 m s-1 while navigating the turn. Using information provided in Fig. 2.3, explain if the robot is accelerating while making the right turn. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………