Group+4

Ashlee Tetreault Amber Teeters 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
A. What is your hypothesis? (You will test one variable with and without air resistance.) By increasing the diameter of the object with air resistance it will decrease the range the object will move.

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. Begin by checking the air restistance box. 2. Make sure user choice is selected. 3. Leave the angle at 79.9 degrees. 4. In box 4 labeled diameter start with a diameter of .25 4. Choose fire. 5. Record the range (located at the top with height and time) in relationship to the diameter. 6. Change the diameter to .50 and repeat steps 4-5. 7. Change the diameter to .75 and repeat steps 4-5. 8. Change the diameter to 1 and repeat steps 4-5.

- 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?

increasing the diameter of the object witch air resistance will decrease the range the object will move. By Increasing the diameter of the object with air resistance this will decrease the range that the object will move. Step 5- How do we measure the range?
 * Peer Review: **
 * Hypothesis- **
 * Protocol-**

Prior to initial launch the mass, drag coefficient, altitude and initial speed all need to be set.
 * Variables-**

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.


 * diameter (m) || range (m) ||
 * .25 || 10.0 ||
 * .50 || 4.8 ||
 * .75 || 2.6 ||
 * 1 || 1.6 ||

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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