09/28/2016 : Centripetal Acceleration vs. Angular Frequency

Lab #8:  Centripetal Acceleration vs. Angular Frequency
Name:   Charles Xu,
Partner: Anthony, Michell
Date:     09/28/2016

Statement:
We use the rotating disk to find the relationship between Force, Radius, and Angular Speed by varying masses, radii, and voltage. 

Theory:
1st: If radius increases, force will increase, and angular speed omega will increase;
2nd: If Voltage increases, which will increase angular speed omega, therefore, force will increase;
3rd: If mass decreases, force will decrease, and angular speed omega will decrease.

Summary:
Here is the set up of the electric rotating disk.

For the first experiment, we set mass to be 200 grams and Voltage to be 6.1 volts. Then we varied radius from 19 cm to 28.5 cm, 40cm, and 54cm. We collected data from Logger Pro. 

Data for Experiment #1

For the second experiment, we still set the mass to be 200 grams and radius to be 54cm, but this time we were varying the voltage from 6.1 volts to 6.6 volts, 7 volts, and 7.7 volts.

Data for Experiment #2

For the third experiment, we set the radius to 54cm and voltage to 7.7 volts. This time, we varying the masses from 200 grams to 100 grams, and 50 grams.

Data for Experiment #3

Conclusion:

From the first set of experimental datas, we found out that when radius increases, the force the sensor detected increases. 

From the second set of experimental datas, we found that when voltage increases, it increases the angular speed and the force.

From the third set of experimental datas, we found that when the mass decreases, the force decreases as well.