Group+3+-

Joshua McGhee Christine Scott BJ Lewis
 * Names of Experiment Designers ** (those that design the experiment):
 * Names of the Peer Reviewers ** (collaborating group):


 * Names of the Investigators ** (those that will conduct the experiment):

Part 1. Design of a projectile motion experiment
Question- Which mass will be launched the furthest if only the mass can change?

A. What is your hypothesis? (You will test one variable with and without air resistance.)
 * Hypothesis**-If we shoot a greater mass than it will be launched the furthest.

B. Create a step by step experimental protocol to test your hypothesis using the applet at: @http://phet.colorado.edu/sims/projectile-motion/projectile-motion_en.html
 * 1) Check air resistance to on
 * 2) Set projectile to user choice.
 * 3) Set launch angle to 75, speed to 20, projectile diameter to 1, drag coefficient to 1, and altitude to 1.
 * 4) Select a mass for the projectile
 * 5) Fire projectile
 * 6) Measure and record the launch range as reported at the top of the screen.
 * 7) Repeat launching steps using 5 varying masses.
 * 8) Repeat steps 1-7 but with air resistance off.

- What are the independent vs. the dependent variables in the experiment? - How will you test air resistance in the experiment after testing your initial variable? How do the two variables interact? - How many repetitions will you need to carry out within the experiment? - What data will you collect and how will you collect it?
 * In your experimental protocol you may wish to ask yourself the following: **

C. Experimental Protocol:

Part 2. Peer review of experimental protocol.
A. The peer review group should enter their comments regarding the experimental protocol below. They should ask themselves: - Is the hypothesis being careful tested? - Is the protocol easy to follow? Is it sequential? - Can the independent and dependent variables be easily identified and measured?


 * Peer Review: **
 * Hypothesis could be a little clearer; use if,then statement for example. **
 * State clear variables that appear on the screen **

In step 6; may want to reword to: Record range value at top of page

Also instead of "increase mass" give specific increments and number of trials.

B. The experimental designers should now alter the experimental protocol based upon peer review.

Part 3. Conduct the experiment.
Now a different group will conduct the actual experiment using: @http://phet.colorado.edu/sims/projectile-motion/projectile-motion_en.html

A. The investigational group should try to follow the protocol as written. Changes can be made if the protocol is not clear.

B. Data should be entered below. Tables for data can be made using the wiki. Simple graphs can be created in MS Office if time allows.

Part 4. Results and Discussion
The investigational group should now write a short paragraph using scientific writing to explain their findings. Findings will be discussed with the group at large.

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