EJC Physics Databased Questions (full)

Page 1 of 18 9749(2023) H2 Physics Data-based Questions Data-Based Questions In Support of Practices of Science Science is more than just acquiring knowledge. It includes understanding the nature of Science, and how it is generated, established, and communicated. DBQs typically show varied types of data presentation and is an opportunity for students to demonstrate their ability to digest data, to apply knowledge in the real -world context, and to recognise technological limitations/trade-offs in each situation. Assessment Style DBQs will appear at the end of Paper 2. The context is likely novel and may involve concepts from beyond the syllabus . There will be sufficient contextual information provided. The DBQ(s) will constitute 20 – 25 marks (out of the total 80 marks in Paper 2). Therefore, we should reserve the last 30 minutes for tackling DBQs. Paper Type of Paper Duration Weighting (%) Marks 1 Multiple Choice 1 h 15 30 2 Structured Questions - Data-Based Question(s) 1 h 30 min 23 30 60 80 30 min 7 20 3 Longer Structured Questions 2h 35 80 4 Practical - Planning Question 2h 16 20 44 55 30 min 4 11

Page 2 of 18 9749(2023) H2 Physics Data-based Questions What to expect for a DBQ We should expect the unexpected. Cliches aside, note that the following is non-exhaustive: Possible Types of Data Skillset Needed • Knowledge from within syllabus • Paragraphs and prose • Novel equations • Tables • Graphs • Statistics • Linearisation of equations • Selection and/or justifying choice of graph axes • Calculation of constants • Verification of validity for proposed relationships • Graph-drawing • Figure / Diagram sketching • Extracting and using relevant info • Interpreting of meaning behind equations and/or quantities in an equation • Weighing pros and cons Also, expect lengthy questions. We provide a few past-year DBQs to illustrate: SG 2017: Solar-powered Aircraft (23 marks across 7 pages) SG 2018: LEDs (22 marks across 5 pages)

Page 3 of 18 9749(2023) H2 Physics Data-based Questions SG 2019: Gravitational Waves (24 marks across 5 pages) SG 2020: F1 Tyres (24 marks across 6 pages) SG 2021: X-rays (22 marks across 5 pages) To get ourselves familiar with DBQs, we will go through a few lecture examples . We will be deliberately explicit in highlighting the type of skills being examined when developing our answers. We will not be going through the questions in full. Instead we selected a few interesting interesting examples that show varied types of data.

Page 4 of 18 9749(2023) H2 Physics Data-based Questions Lecture Example 1: Analysis of braking of a vehicle Skills Modern vehicles are provided with different types of brakes. In cars, the foot brake is the most important with respect of control and safety of a vehicle while the hand brake is used as a reserve brake. One of the principal braking parameters of a vehic le is the dec