ITS3 S10 solutions - Name:_Answers_ P2601 (Spring, 2010)...

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Name:_____ Answers_ _______________________ P2601 (Spring, 2010) Individual Exam 3 "It is important to realize that in physics today, we have no knowledge of what energy is." Nobel Laureate R. P. Feynman "No one means all he says, and yet very few say all they mean, for words are slippery and thought is viscous." Henry Adams I. (63 pts) For the multiple choice only: No explanation is needed if your answer is correct. Justify your answer with well-chosen words or a formula and you may receive partial credit even for a wrong answer--but use your time wisely. 1. _ D A spring-loaded toy dart gun is used to shoot a dart with a launch speed of 16 m/s. The same dart is shot a second time from the same gun, but this time the spring is compressed only half as far before firing. Approximately what is the launch speed this time, neglecting friction and assuming an ideal spring? A. 32 m/s B. 16 m/s C. 11 m/s D. 8.0 m/s E. 4.0 m/s 2. _ C _A viscous fluid flows through a long tube at an average speed of 40 cm/s. What would be the flow speed if the tube’s cross sectional area is doubled, but the pressure difference between the ends of the tube is unchanged? A. 320 cm/s B. 160 cm/s C. 80 cm/s D. 40 cm/s E. 20 cm/s F. 10 cm/s 3. _ B The figure shows a portion of a rope in which a disturbance XY travels in the direction of the arrow. The direction of the instantaneous velocity of a particle of the rope at point P at the instant shown in the figure is best
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This note was uploaded on 07/23/2011 for the course PHYS 2601 taught by Professor Andrews during the Summer '10 term at Youngstown State University.

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ITS3 S10 solutions - Name:_Answers_ P2601 (Spring, 2010)...

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