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Unformatted text preview: ------------------------------------------------------------------------ *220/fall2011 PL09/plqz09.xm* for user *ajcg* ** /(Last updated: Thu Aug 11 15:05:20 2011)/ Level 1 ------------------------------------------------------------------------ Conservation of Energy Quiz/Exam questions can be viewed and submitted only once, and, once viewed, must be submitted within the allowed elapsed time. *(A)* I can choose the origin of my system anywhere I please since only change in potential energy matters. 1. False 2. True ____________________ /[weight: 1]/ *(B)* Friction is an exception of the law of conservation of energy. 1. True 2. False ____________________ /[weight: 1]/ *(C)* Power is related to energy and time. 1. True 2. False ____________________ /[weight: 1]/ *(D)* Four expert skiers travel down the ski trails shown in the figure below. All have the same initial height (at the start of the trail) and the same final height (at the bottom, on the far right in each sketch), and there is no friction on any of the trails. Which of the following statements is true? Assume air drag can be neglected. *(a)* The skier in Figure C probably arrives at the far right last. *(b)* The skiers all arrive at the bottom with the same speed. *(c)* The skier in Figure B probably arrives at the far right first. 1. All the statements are incorrect. 2. Only statement *(b)* is correct. 3. Only statement *(c)* is correct. 4. Only statement *(a)* is correct. 5. All statements are true. ____________________ /[weight: 1]/ ------------------------------------------------------------------------ ...
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This note was uploaded on 12/07/2011 for the course PHYS 220 taught by Professor Chang during the Fall '09 term at Purdue University.

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