Apparatus: This device is known as the Pasco Rotational sensor.
What we did: First we had to take the measurements of several items to at least 3 significant figures.
- Diameter and mass of top steel disk: 126.6 mm, 1356 g
Second we opened up logger pro. Next we set up the pasco rotational sensor to 200 counts per rotation. Then we opened up the hose so that the bottom disk would be able to rotate independently form the top disk when the pin was plugged in its place. Next we wrapped the string around the metal plate as the picture above shows to position the mass at the highest point on the pulley. finally we turned on the air and captured the and collected the data onto logger pro. This gave us an angular velocity vs. time graph which we were able to use to find the angular velocity of the upward and downward motion.
We used this same process to find how the change in the hanging mass effects the angular acceleration, the change in the torque effects the angular acceleration, and how changing the rotating mass effects the angular acceleration.
Conclusion: The lab asked us to analyze three thing which were outlined in the hand out
EXPTS 1,2, and 3 Effect of changing mass: We found that the heavier the mass the larger the angular acceleration.
EXPTS 1 and 4 Effecs of changing the radius and which the hanging mass exerts a torque: We found that the larger the radius of the pulley the larger the angular acceleration
EXPTS 4,5, and 6 Effects of changing the rotating mass: We found that the lighter the roraring mass, the larger the angular acceleration.
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