PHY130 Practice Exam #2_1.pdf

PHY130 Practice Exam #2_1.pdf - Prof Mitchell PHY130...

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Prof. Mitchell PHY130 Practice Exam #2 NAME: You have 50 minutes to answer the following questions. All questions that aren’t fully answered will still receive points for partial credit. Please sign below the following statement: TO THE BEST OF MY KNOWLEDGE I HAVE NOT CHEATED OR RECEIVED ANY HELP ON THIS EXAM :
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Part I. Multiple Choice (4 pts each) Instructions: Answer 6 of the following 8 questions. Please clearly circle one and only one answer for each of the following. Show all of your work. Partial credit may be given if you include your work. Questions: 1. An object on a rope is lowered at a steadily decreasing speed. Which is true in comparing the tension (T) and the force due to gravity (F g ) acting on the object? (a) T > F g (b) T < F g (c) T= F g (d) Need more information. 2. Starting from rest, a wheel with constant angular acceleration turns through an angle of 25 rad in a time t. Through what angle will it have turned after time 2t? (a) 50 rad (b) 75 rad (c) 100 rad (d) 200 rad 3. A toy car accelerates from rest on a level circular track. If the car travels through an angle of 10 rad in 2.0 seconds, what is the angular acceleration of the car? (a) 5.0 rad/s 2 (b) 10 rad/s 2 (c) 1.5 rad/s 2 (d) 20 rad/s 2
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