2024 SCGS 4 IP PHYSICS P2

1 SINGAPORE CHINESE GIRLS’ SCHOOL END-OF-YEAR EXAMINATION 2024 YEAR FOUR INTEGRATED PROGRAMME PHYSICS PAPER 2 Wednesday 2 October 2024 1 Hour 45 mins Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Section A Answer all questions. Section B Answer all questions. Question 11 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 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. Take g = 10 ms-2 or 10 Nkg-1 unless stated otherwise. This question paper consists of 23 printed pages and a blank page. For Examiner’s Use Section A 70 Section B 10 Total 80 CANDIDATE NAME CLASS REGISTER NUMBER

2 SECTION A Answer all the questions in this section. 1 A man standing in a hot air balloon released a ping pong ball as the balloon accelerated upwards at 2.0 m/s2. The upward speed of the balloon is 2.0 m/s at the moment the ping pong ball is released. The ping pong ball has the same velocity as the balloon when it is released. Fig. 1.1 shows how the velocities of the hot air balloon and the ping pong ball vary with time. Fig. 1.1 (a) Explain why the acceleration of the ping pong ball at its maximum height is 10 m/s2. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… [2] (b) Describe the motion of the ping pong ball from the moment it is released until it reaches terminal velocity. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… [2]

3 (c) Calculate the average velocity of the hot air balloon from t = 0 to t = 3.0 s. Average velocity of hot air balloon = …………………….. [3] [ Total : 7 m ]

4 2 Fig. 2.1 shows how the speed of a rocket SpaceX varies with time as it enters the gravitational field of a new Planet Y with negligible atmosphere. Fig. 2.1 ( not to scale) SpaceX has a total mass of 1.8 x 10 6 kg. Once it enters the atmosphere of Planet Y, it undergoes free fall for 8.0 s before its engine fires a continuous thrust to bring it to a gentle upright landing on the surface of Planet Y. (a) C