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Unformatted text preview: ------------------------------------------------------------------------ *220/fall2011 PL08/plqz08.xm* for user *ajcg* ** /(Last updated: Thu Aug 11 14:22:09 2011)/ Level 1 ------------------------------------------------------------------------ Work and Energy Quiz/Exam questions can be viewed and submitted only once, and, once viewed, must be submitted within the allowed elapsed time. *(A)* Is it possible to do work on an object that remains at rest? 1. Yes 2. No ____________________ /[weight: 1]/ *(B)* A pendulum bob swings back and forth along a circular path. Does the tension in the string do any work on the bob? Does gravity do work on the bob? (*Please select all those apply.*) 1. both do work 2. neither do work 3. only tension does work 4. only gravity does work ____________________ /[weight: 1]/ *(C)* Consider a rock of mass /m/ traveling at speed /v/. Suppose the mass is doubled and the speed is cut in half. Which of the following statements is true? 1. The kinetic energy decreases. 2. The kinetic energy increases. 3. The kinetic energy is the same. ____________________ /[weight: 1]/ *(D)* Work done by an operator of a pulley is amplified by the pulley. 1. False 2. 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-West Lafayette.

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