In this lab the students measure angular velocity of a disk to verify Newton's 2nd law for rotation and the work-energy theorem in rotational motion.� The lab should be pretty straightforward, but a bit of care must be taken to set up the equipment. The disk and pulley need to be centered on the axle to avoid wobbling, and the string needs to unwind frmo the spool without any kinks. If the student carefully observes the system during the experiment to make sure there was minimal wobble of the disk and no kinks in the string as it unwound from the pulley then they should be able to get very good data.��