Think about a simple physics experiment like firing a cannonball, as mentioned in Chapter 1 of your textbook. Now, imagine that you have devised your own length measurement system based on the span of your forearm. Apply the scientific method to ask the question, “How far will the cannonball fly?” and use your measurement system to record the distance.
Part of the scientific method is the testing of your experiment by other physicists like you. Include the following in your analysis:
Which difficulties would arise for them in confirming or denying the validity of your results?
What are the control variables in your experiment?
Which other measurements would you need to devise to monitor them?