Ihave to write a two page paper and i'm stuck on how i would set this up? it's in my intro to physics course.

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?

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.