Question

Option #1: Cannon Ball Physics Essay 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?

Answer 1

The distance would depend upon, speed of the ball, angle of launch, mass of the ball, amount of gunpowder used, air resistance and friction in the cannon.

Angle, mass, gunpowder can be easily measured. Hence no need for experimental setup.

Speed measurement would require conservation of energy calculations.

air resistance and friction are usually neglected as their effect is small. But if there's a huge difference in theoretical and practical value, they will have to be measured separately.

Air resistance can be calculated as formula of viscous drag.
Friction can be calculated from newton's laws.