Temperature's+Effect+on+Balls

Names: June and Doug


 * The Effect of Temperature on Seperate Balls**

How does the temperature of different balls effect the bounciness of them?
 * Lab goal/question:**

1. Obtain 1 Tennis Ball and 1 Squishy Stress Ball 2. Start with one set of balls in room temperature, after in a refrigerator, and after in a freezer. 3. Measure Temperatures of balls 4. Drop each ball from 2 meters 5. Record Potential Energy and record energy loss (Drop each ball from 2 meters). 6. Compare the results.
 * Procedure:**

1 Tennis Ball 1 Squishy Stress Ball 2 Meter Sticks 1 Thermometer Tennis Ball Mass: 0.055kg Stress Ball Mass: 0.018kg Drop Height of Each Ball: 2m
 * Required Tools:**
 * Data/calculations:**

Potential Energy of Tennis Ball: 10.78J (.55kg*9.8*2m) Tennis Ball Bounce: 1m Potential Energy After Bounce: 5.39J (.55kg*9.8*1)
 * Tennis Ball (Room Temperature 68F)**

Potential Energy of Stress Ball: .3528J (.018kg*9.8*2m) Stress Ball Bounce: .85m Potential Energy After Bounce: .149J (.018kg*9.8*.85m)
 * Stress Ball (Room Temperature 68F)**

Potential Energy of Tennis Ball: 10.78J (.55kg*9.8*2m) Tennis Ball Bounce: .9m Potential Energy After Bounce:4.85J (.55kg*9.8*.9m)
 * Refrigerated Tennis Ball (50F)**

Potential Energy: .3528J (.018kg*9.8*2m) Stress Ball Bounce: .6m Potential Energy After Bounce: .106J (.018kg*9.8*.6m)
 * Refrigerated Stress Ball (58F)**

Potential Energy of Tennis Ball: 10.78J (.55kg*9.8*2m) Tennis Ball Bounce: .4m Potential Energy After Bounce: 2.156J (.55kg*.4m)
 * Frozen Tennis Ball (23F)**

Potential Energy: .3528J (.018kg*9.8*2m) Stress Ball Bounce: .25m Potential Energy After Bounce: .044J (.018kg*9.8*.25m)
 * Frozen Stress Ball Bounce (35F)**


 * Graph of Compared Drops**

After analyzing all of the data of the balls and temperature, we noticed that both sets of ball bounced highest in the room temperature and lowest while frozen. We believe this trend happened because the temperatures had effected the elasticity of the balls. The colder the balls become, the tighter the elasticity is, thus making the balls drop less bouncy. The data we recorded also shows that this idea is true. This is what we thought would be true going into this lab. We are not sure if their is a tipping point, (a warm temperature where it will cause the ball to bounce less or opposite for cold). There are some errors in this lab because we kept the balls in the refrigerator. Doing this, we never were really able to bring the balls to the temperature that we wanted. The ideal temperature would have been just above freezing, but for this lab we had to test the temperatures closer to room temperature.
 * Reflection/conclusion:**