PHY 317K QUIZ 1 SOLUTION

PHY 317K QUIZ 1 SOLUTION - PHY 317K Quiz 1 Answer Key 1 I)...

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PHY 317K Quiz 1 Answer Key 1 I) Some Quickies 1.) Estimate how many cars pass across the pedestrian crosswalk on Guadalupe in front of the Coop during lunch hour on a typical working day. A.) n cars 120 B.) n cars 600 C.) n cars 3 , 000 D.) n cars 15 , 000 2.) Evaluate g , the acceleration due to gravity at the earth’s surface, in “Star Trek” units where time is measured in earth years (Y) and dis- tance in light-years (LY), the distance light travels in one earth year. In SI units, the speed of light is c = 3 . 0 × 10 8 m / s. A.) g = 3 . 3 × 10 - 4 LY / Y 2 B.) g = 1 . 0 LY / Y 2 C.) g = 2 . 9 LY / Y 2 D.) g = 9 . 8 LY / Y 2 3.) Roughly, what is the farthest distance D a baseball can be thrown on a level playing field if released with speed v 0 = 30 m / s and ignoring air resistance? A.) D 50 m B.) D 70 m C.) D 90 m D.) D 110 m 4.) In units of the gravitational acceleration g , what horizontal accelera- tion a is experienced by an Indianapolis 500 driver when going through a turn of radius r = 256 m at 200 miles per hour? A.) a = 0 . 9 g B.) a = 1 . 8 g C.) a = 2 . 7 g D.) a = 3 . 1 g
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PHY 317K Quiz 1 Answer Key 2 II) River Crossing Consider crossing a river that is w = 1km wide in a small boat, which moves forward at a speed u = 6 miles per hour relative to the water around it. The river has a
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This note was uploaded on 02/11/2011 for the course PHY 317k taught by Professor Kopp during the Spring '07 term at University of Texas at Austin.

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PHY 317K QUIZ 1 SOLUTION - PHY 317K Quiz 1 Answer Key 1 I)...

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