Moment of Inertia
Purpose: The purpose of this lab is to determine the experimental moment of inertia of a disk and a ring using the principles of conservation of energy. The experimental values of each will be compared to the theoretical values.
Procedure: The masses of the disk and ring were weighed using a triple beam balance. The disk and ring were then measured using a meter stick and a set of caliper jaws. The diameter of the drum was then measured as well. The disk was then placed on top of the axle horizontally, and then leveled. The friction mass was then found by trial and error. The friction mass is the mass that keeps the axle spinning at a constant speed. The friction mass was removed and replaced with the 50.0 gram driving mass. The mass was released and timed until it hit the ground. This was repeated twice more. The ring was then placed on top of the disk, and the new friction mass was found. A 100.0 gram driving mass was hung and repeated the same way as the 50.0 gram mass tests were done. The disk was then set up vertically and the tests were repeated the same as before, finding the friction mass and using the 50.0 gram driving mass.
| |Disk- horizontal |Disk and Ring |Disk- vertical | |Velocity of Driving mass |1.14 |0.94 |1.60 | |(m/s) | | | | |Rotational Kinetic Energy |370 |870 |392 | |(J) | | | | |Angular Velocity |9.96 |8.22...