Friday, April 8, 2011

Velocity Lab Investigation

The Velocity Lab bore interesting results. The weight between the golf ball and the ping pong ball were extremely different in weight, which had to do with the results. I thought that the results were going to be very ranged because of the difference in weight. But I was wrong. The golf ball weighed in at 45.66 grams and the ping pong ball weighed in at 2.5 grams. The velocity results surprised me. The average velocities for the ping pong ball were higher. I thought that since the golf ball had more weight, then it would have a higher velocity. For the whole experiment the golf ball had the higher times, because obviously ofthe weight. But the 3 meter test for the ping pong ball made the average velocity sky rocket. It was getting plus 1 second. My hypothesis was semi-incorrect because I had stated that the golf ball would fall faster, so then the average velocity. I thought that if an object had more weight, then the time that it would take would be longer. In some cases, it was, like in the 2 meter and 3 meter testing. But, the 1st meter test surprised me because of the weird time shift towards the ping pong ball. The ping pong ball actually fell faster in the first test. I think that it was due to the fact that there was less distance to cover, so the velocity and speed of the golf ball had no time to really "get in to it" before making contact with the ground. For the ping pong ball, the lack of weight probably caused it to fall faster. The force of the ping pong ball was at 22.5 and the force of the golf ball had a huge difference, just because of the weight. It was 447.468. We used the force=mass times acceleration formula to find these answers. There were many flaws in this experiment. First of all, the exact measurements were not calculated, because the ceiling in the classroom were too short. We need a 3 meter drop, but the ceiling refrained that from happening. The best we did was drop it from the edge of the ceiling. Another flaw was the motion sensors. We did not read the instructions on the box, and did not realize that sound vibrations will affect the outcome, it did not help that we were all talking loudly. It will also hard to keep the motion sensor stable, because we would accidentally twitch or make a jerky motion and the motion sensor would record it. Once we were quiet, the motion sensors worked a little better. I was fortunate enough to have a tall person in my group, so dropping it from the ceiling as no problem, but for other groups, I noticed that a few of them were having some problems. Overall this experiment was a great way to learn how much mass, velocity, height, weight, etc. can change the differences of the lab's results.


Golf Ball:

1 meter

2 meter

3 meter

Average Velocity

0.53

0.78

0.99

1.69

0.7

0.63

0.67

2.98

0.53

0.77

0.99

3.89


Ping Pong ball:


1 meter

2 meter

3 meter

Average Velocity

0.42

0.81

1.22

2.08

0.49

0.91

0.85

2.06

0.52

0.89

1.02

3.62