20288 2. 3. 4. For uniform circular motion, write Vtangential in terms of T, and atangential in terms of a.. Under what conditions would the falling mass rise again to the same level from which it was released? How do we eliminate the contribution of the shaft and crossbar to arrive at the experimental moment of inertia of the two masses? How are we going to deal experimentally with any friction present? Idyn, masses = Idyn, total Idyn, w/o masses Note that we have ignored the friction in the bearings of the shaft and pulley and of the air, hoping that this will be small. An item in the Final Exercises will consider the effects of friction. PO