Good question. This was an experiment and not an investigation. What is the difference 🤔? Experiments are done to prove a known problem or during an investigation, and therefore, not investigative questions are needed. But an investigation is when you identify a problem, then you need to ask a question about the problem (investigatice question). This time was just an experiment to calculate Fnet. I hope you understand. Let me know. Thank you 😊 for the question.