Keep the route distance and your average speed to model travel time. Ignore wind resistance or road surface details. Ignoring these simplifies the calculation, making it easier to determine a useful, approximate arrival time.
Suppose you ride a bicycle from your school to your home. You want to model the time it takes to go home from school. What details would you keep? What details could you ignore? Suggest why ignoring some details may actually be useful. (class 9 science exploration chapter 1 question)
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To model the time taken to cycle home, you should keep essential variables like total distance and your average cycling speed. You can safely ignore minor details such as wind resistance, traffic lights or road surface variations. Ignoring these complexities is useful because it simplifies the system enough to provide a quick, meaningful estimate, helping you focus on the core factors that primarily determine your journey’s duration.
For more NCERT Solutions for Class 9 Science Exploration Chapter 1 – Exploration: Entering the World of Secondary Science Extra Questions & Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-1/