The motion sensor wasn't registering the correct height, it was about half a meter off. This made it difficult to calculate the different drop heights. We tested the motion sensor outside, and it worked better without all of the noise from inside the classroom. It often didn't register and motion, and at the end, we had the sensor more than 3 meters up, and it only registered at about .5 meters.
Physics Reflections
Friday, April 8, 2011
Velocity Lab
In the lab, we calculated velocity and acceleration of the golf and ping-pong balls. In the old school test using a meterstick and timer. The velocity for the golf ball was: 2.0 at 1m, 3.3 at 2m, and 4.3 at 3m. The velocity of the golf ball was 2.5 at 1m, 3.3 at 2m, and 3.7 at 3m. All falling objects accelerate at a rate of 9.8 m/s/s. The force of the golf ball dropping was 447.468N of force and the force of the ping pong ball was only 24.5N. The golf ball had a much higher mass to begin with, and that is why it had a higher rebound when dropping. In the tests with the computer interface, the data was a bit skewed.
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