'" Part One: Conceptual Problems 1. A small ball ofmass m is free to slide on the smooth vertical circular track as shown. The ball is given sufficient speed at point A (when lJ that it can rotate eouaterelockwise in a complete circle. Points B, C, and D correspond to angles lJ = ; , () = 11:, and () = 3;, respectively. o •• r--;-I' 1 ' t-t,A 1 B As the ball travels from point 1 to point 2 ofthe pairs (1,2) listed below, indicate the appfoximatedirection of Ap=P2 -PI' the c~ein momentum. (e.g. (A,D) means you are looking at Ap = PD IfAp = 0, circle O. Note: p =(A, C) 1.1.,,--++-)1.(0 (B,C) = 0) so 1 8 linear -Pd') mv.