Y2012SP-PHYS105-Practice Exam 3

# Y2012SP-PHYS105-Practice Exam 3 - UIC Physics 105 Midterm...

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UIC PHYSICS 105 Spring 2012 Practice Exam 3 Page 1 of 7 UIC Physics 105 Midterm Practice Exam 3 Best if used by April 30, 2012 (2 Hours) PROBLEM POINTS SCORE Multiple Choice 30 Short Problem 1 10 Short Problem 2 10 Short Problem 3 10 Short Problem 4 10 Short Problem 5 10 Long Problem 20 Total 100

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UIC PHYSICS 105 Spring 2012 Practice Exam 3 Page 2 of 7 MULTIPLE CHOICE (3 points each) Clearly circle the letter of the best answer. No points are deducted for incorrect answers. MC1: If Martian Orbiter I is sailing around the planet in a circle which has an orbital radius nine times that of Martian Orbiter II, who’s speed is v 2 , what is the speed of Martian Orbiter I? (A) v 1 = (1/9) v 2 (B) v 1 = (1/3) v 2 (C) v 1 = v 2 (D) v 1 = 3 v 2 MC2: A satellite moves around the Earth in a circular orbit of radius r with speed v 0 . Suddenly, an explosion breaks the satellite into two pieces, with masses m and 4 m . Immediately after the explosion the smaller piece of mass m is stationary with respect to the Earth and falls directly toward the Earth. The speed v 4 m of the larger piece immediately after explosion is: (A) v 4 m = (1/4) v 0 (B) v 4 m = v 0 (C) v 4 m = (5/4) v 0 (D) v 4 m = 5 v 0 . MC3: A mass m = 450 g oscillates from a vertically hanging light spring with a period of 0.55 s. It started by being compressed 10 cm from the equilibrium position (where y = 0) and released. How long will it take to get to the equilibrium position for the first time? (A) 0.14 s (B) About 0.28 s (one-half period) (C) 0.55 s (D) The mass will never reach equilibrium. MC4: A damped harmonic oscillator involves a block of mass m = 2 kg, a spring with k = 10 N/m, and a damping force with damping constant b = 0.1 kg/s. Initially it oscillates with amplitude of 20 cm.
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