test2Makeup

# test2Makeup - PY2O5N Fall 2007 TEST 2 make.up 75 minutes...

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PY2O5N Fall 2007 TEST 2, make.up 75 minutes CLOSED BOOK Name (print) 4rt to - lr ro# ooo77 7 ?Va Sectionf O & fe llgf 11Part A. Multiple-Choice Questions (75To, i'.e.,5 points for each question) Lrt I l) Instructions for Part A; Circle the best answer to each of these fifteen questions. You do not need to explain your thinking, and work shown will not be graded' constant: G:6.6.6 x 10-rr N'm2/kg2 1. If you stood on a planet having a mass four times greater than Earth's mass, and a radius two times greater than Earth's radius, you would weigh (a) twice what you weigh on Earth. (b) fpur times what you weigh on Earth. \gfltrre same as You weigh on Earth. (d) one-half what you weigh on Earth. 2. Consider a spherical asteroid with a mass of 3.1 satellite orbiting 5.0 km above the surface? a radius of 8.8 km. What is the speed of a 4 4 ,+= x 1016 kg and 6at - r (a) i7 m/s (b) 20 mls (c) 39 m/s @,-r, (a) car ,L (b) car M &*" ]tf - = \$tltyr 7 2a 't/ ffii- *-* t {o/w''/ & {rr'r 3. You carry a 7,0-kg bag of groceries 1.2 m above the ground at constant velocity across a 2'3-m room. How much work does the force of gravity do on the bag during the motion? @)Fr [email protected] "(c) 1b8 J fai tun J 4. Three cars (car L, ca,r M, and ca,r .|y', in order of decreas'ing mass) are moving with the same velocity when their drivers slam on the brakes. For which car is the amount of work done by friction in stopping it the highest?

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