PHYS-1100 Fall 2010 Exam 2 answer key

PHYS-1100 Fall 2010 Exam 2 answer key - 1. A skateboarder...

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1. A skateboarder rides in a straight line along a smooth, level street at a steady speed of 7.0 m/s for 20 s, then encounters a rough patch of pavement 40 m long that takes him 15 seconds to skate over. What was his approximate average speed (magnitude of velocity) for the entire straight line skate? a) 4.7 m/s b) 6.0 m/s c) 5.5m/s * d) 5.1 m/s e) none of these are even approximately correct 2. The area under a certain graph gives information about the change in the velocity of a certain moving object. The slope of that graph does not yield particularly useful kinematic information. The graph is most likely a) x -component versus y -component of position b) position versus time c) velocity versus time * d) acceleration versus time e) none of these are even approximately correct 3. A moving particle is experiencing an acceleration whose magnitude is non-zero and constant, yet the speed (magnitude of velocity) of the particle is not changing. What can you say about the motion of this particle? a) it is in free fall b) it is at rest * c) it is moving in a circular path d) it is moving in a parabolic path e) none of the above are possible 4. In a centrifuge used to train astronauts, the trainee is seated in a gondola at the end of an 10 meter long boom.
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This note was uploaded on 06/07/2011 for the course PHYS 1100 taught by Professor Giomanico during the Spring '08 term at LSU.

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PHYS-1100 Fall 2010 Exam 2 answer key - 1. A skateboarder...

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