Welcome to Table 4 (period 7)'s Rubber Band Wiki page!

Created by Helen Anderson, Nathan Kelleher, Max Maller

A Brief Explaination of What this Wiki is About:

This wiki page documents everything we did as a group to create and test our rubber band launcher.  We will display the testable question (the reason for this entire project), our hypothesis, different variables and more. 

Testable Question:

At which launch angle (15, 30, 45, 60, or 75 degrees) does the rubber band travel the furthest?

Hypothesis:

We believe that because 45 degrees is in the middle range of the other tests, therefore it cannot launch too high, or too low. Reaching the farthest distance it can compared to the other tests.

Independent, Dependent, and Controlled Variables:

          Independent Variable (What you are purposely changing?):

               The angle in which the rubber band is shot at

          Dependent Variable (The change that you measure):

               The distance in which the rubber band is shot.

          Controlled Variables (What stays the same the entire experiment?):

               . The same rubber band.

               . The same length it is pulled back at.

               . Temperature

               . Wind

               . Terrain

               . Same rubber band launcher.

               . Same measuring device.

               . Same protractor used to measure all angles.

               . Same measuring length (cm, m, inch, etc.).

               . Same clothes pin used on design.

Materials (pictures + wowrks):

• 2 Large Slabs of Wood
• Brass Hinge
• Hinge Screws
• Clothespin
• Wooden Paint Ruler
• Tape measure
• Protractor
• Camera
• Tripod
• Tape
• Space for Launch
• Rubber Bands
• Chopsticks
• Electric Drill
• Scissors

Data Table/Results:

Video:

Conclusion:

Judging by all the data and results, our hypothesis was wrong. Believing that 45 degrees would go the farthest was a false conjecture that we presumed to be right based on back round research. With the average of 15 degrees being 553.1, it was much farther than any of the other measures such as the average of 30 degrees being 516.7, 45 degrees average being 456.9, 60 degrees average as 323.5, and finally 75 degrees as 203. Obviously the higher number of angle measure means shorter distance as shown by the data. This was because of the glide of the rubber band in the air, if at a higher angle there is more gliding then at a shorter angle. Therefore we got the results that we collected. Finally, we now know that 15 degrees was the best, and 75 degrees worst, mostly based on glide.

Related links:

• What is a Projectile?http://www.physicsclassroom.com/Class/vectors/u3l2a.cfm
• Trajectory Research http://www.mrozeni.com/science_projects/rubberband_project/trajectory_research
• Projectile Moon http://galileo.phys.virginia.edu/classes/109N/more_stuff/Applets/ProjectileMotion/jarapplet.html
• Virtual Laboratory: Cannon http://galileo.phys.virginia.edu/classes/109N/more_stuff/Applets/ProjectileMotion/jarapplet.html