ENPH-131--2010 - ~ Faeulty of Engineering and Department of...

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VI ~ Faeulty of Engineering and Department of Physies Engineering Physies 131 -Spring 2010 Final Examination 17 June, 2010, 1500-1730 hrs Instruetor: Carmen Ropehan Please plaee your OneCard on your desk. No notes or textbooks allowed. • Formula sheet is on the last page (may be removed). Otherwise do not separate the pages. • Only non-programmable calcu1ators approved by the Faculty of Engineerins permitted. • The exam has three parts: Part' One (Conceptual), Part Two (Multiple Choice) and Part Three (Long Answer). For Part Three, ehoose two of the three problems. H aU three are attempted, only 10. and 11. wW be marked. • The value ofeach question is indicated on the table below. • Show all work in a neat and logical manner. • Indicate clearly ifyou use the backs ofpages for material to be marked.. • Extra formulae: g=9.82 m/s2 =32.2 ftls2;hYE =-brf(x)dx;1 -a II -b±.Jb2 -4ac ----;3 =r(}.2a Name: 10#: Signatw"e: Problem Maximum Mark Part One: 1-4 16 (4 each) Part Two: 5-9 20 (4 each) Part Three: 10..12 44 (22 each) Total 80 '---
'" 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.

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