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Tennis Ball Experiment
Transcript of Tennis Ball Experiment
the bounce of a
If we freeze a tennis ball, then it will not bounce as high as the room temperature ball because, the air molecules inside are moving slower which makes it more dense.
1) Get 4 new tennis balls
2) 24 hours prior to the experiment , place 1 tennis ball in the freezer and keep 1 out in the open
3) Tape 2 meter sticks against the wall with one on top of the other
4) Take 1 room temperature ball and drop it from 150 cm, record height of first bounce
5) Repeat step 4 with the frozen tennis ball
6) Repeat steps 2-5 the next day (do step 2 the day before)
7) Once you have completed your two trials, average the height of the room temperature tennis balls and the frozen tennis balls
8) Graph your results and state your conclusion
By: Alaina, Olivia, Nina, and Jared
We accept our hypothesis as it is because, our experiment proves it true. We have discovered that frozen tennis balls do not bounce as high on the first bounce as room temperature tennis balls. Frozen tennis balls bounce around 20 to 40cm on the first bounce, while the room temperature balls bounce 80 to 90cm. An improvment can be made to how we can measure better. It was very difficult to tell exactly how high the ball has bounced. Another good experiment would be to test how hard you have to hit the frozen tennis ball, to have a succesful tennis match. In conclusion, our hypothesis is supported by us because, we proved it during the experiment.
Temperature affects all matter. When tennis balls get colder, its adhesive rubber stretches so it doesn't bounce as high. Also, the air molecules inside of the tennis ball move slower when it's colder. When the air molecules move slower it makes it more dense. As a result it doesn't bounce as high. A room temperature tennis ball will bounce higher because the air molecules are moving faster, which makes it less dense.