AnswersToSampleExam2 - Answers to Sample Exam 2. 1. C...

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Answers to Sample Exam 2. 1. C (constant velocity – net force is zero air resistance force equals grav force) 2. A (this is more calculator-oriented than I am likely to put on the test, but does serve to remind you about scalar product – AKA ‘dot’ product). 3. C (Assume no air resistance, especially at the speed you’d walk across a room) 4. B (Car M starts with the most kinetic energy, so requires the most work to stop. Yes, it is negative work, so you might think that more negative work is a smaller number, but you are asked specifically about the magnitude of work. 5. B (Work done by rider = negative of work done by gravity on rider. Same for each. Joe is faster though, so power for him is higher) 6. A (Conservative forces arose in our discussion of conservation of energy.) 7. A (No friction, no work by other non-conservative forces, so energy conserved. Same change in potential energy gives same change in kinetic energy).
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This note was uploaded on 05/15/2008 for the course PHYS 298 taught by Professor Morrison during the Spring '08 term at University of Louisville.

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AnswersToSampleExam2 - Answers to Sample Exam 2. 1. C...

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