Your Testable Question:

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

Hypothesis: The rubber band will travel the furthest at a 45 degree angle. The other angles are too high/too low, and will fall back to the ground too quickly. The 45 degree angle gives the rubber band time to cover some distance.

Independent Variable:

The angles at which we launch the rubber bands from.

Dependent Variable:

The distance that the rubber bands travel when launched from different angles.

Controlled Variables:

• The device used to launch each rubber band
• The location where the experiment is held
• The type of rubber bands
• The size of the rubber band
• The conditions (wind?)
• The surface on which the launcher is placed (slope)
• The direction of the rubber band launcher
• How far it is pulled back
• Unit of measurement
• Measuring tool used

How we are going to obtain quantitative data. Here's a picture of the tool:

We will use a tape measure to measure the distance.

Summarize your procedures. This does not have to be a detailed procedures but Mr. Ozeni needs to be able to understand what you are doing in your project.

1. Place rubber band launcher at the 15 degree elevation. Make sure it isn't aimed at anyone. Load the launcher with the rubber band in the first notch. Fire. Measure distance and record in packet.
2. Repeat until 10 trials are completed.
3. Repeat step 1 at the 30 degree elevation.
4. Repeat step 1 at the 45 degree elevation.
5. Repeat step 1 at the 60 degree elevation.
6. Repeat step 1 at the 75 degree elevation.
7. Calculate averages and uncertainties.