Data collection on Projectiles

You built a catapult or you captured a screencaster vision of a video game.. 

Catapult:  Adjust it so that it is capable of launching a large marshmallow or wiffle ball from a distance of 3 to 5 meters, and hitting a target that is .30 m high +/- .10 m. You will have 5 trials to hit your target at each distance on Friday, and will be graded according to your accuracy. (10 points)

OR

Video game:  know the game well enough that you can hit the target that I choose multiple times in a row.  You will have 5 trials to prove your mastery of the game, and will be graded according to accuracy (10 points)

Rubric and Questions for Analysis

Using your logger pro data, answer the questions below INDIVIDUALLY and hand in

Where is the biggest frictional in your machine or the game? Explain why this matters to the range. (3 pts)

Determine the maximum range for your machine or game by scaling a known value.. Make at chart that lists all the variables available for y(up), y(down), and x. Below the table, show me or tell me how you arrived at each number.(15 points--one for each variable)
How could you determine F(net) of the projectile?  Draw a force diagram and sent to me? (3 points)
How will the net force of the projectile change if we use another projectile of a different mass?  Be specific. Why?(3 points)

Pick a change in time of .3 seconds somewhere on your Logger Pro data set. Based on your data, determine v(i) at the beginning of the interval and v(f) at the end of the interval in the x and the y directions Using this data, calculate a 'practical' value for the acceleration in the x and the acceleration in the y-directions. Choose your interval carefully so you are not mixing y(up) and y(down. (6 points)

Write a three to five paragraph summary of how you would change the design if you built another machine, and what you have learned about projectiles and engineering design. Include the following terms: potential energy to kinetic energy changes, frictional force, net force, acceleration of gravity, vectors, kinematic equations, independent x and y motions. (15 points)

TO HAND IN:   
a screencast or video with all names attached to it.
an individual review
a Logger Pro screenshot which has data marked on it.