Frequency of Rotation - Physics - Exam Paper, Exams of Physics

Download Frequency of Rotation - Physics - Exam Paper and more Exams Physics in PDF only on Docsity! Page 1 of 8 red Physics 218 Exam 1 Fall 2003 Fill in the GPSCAN Sheet: 1) Name 2) Student identification number 3) Exam number as 04 4) Sign the OPSCAN sheet Important; This test consists of 14 multipla-choice problems. Check that you have all of them in your copy. You are taking the red exam. Be sure your answer key is red. Instrugtlons: For each problem, choose the one answer that is correct or most nearly correct. Make a small mark, for your ayes only, near the letter of your choice. After you finish and check all the multiple-choice problems, transfer your answers to the OPSCAN sheet, with a #2 pencil. Then, until you hand in the OPSCAN sheet, turn the sheet over and leave itface down, You may keep your copy of the exam. The correct answers will be displayed on the course web page soon after the exam, and you can find your score for this exam on CHIP in one or two days. This is a closed book exam, but an equation sheet is provided. You may alse use a numerical calculator. Any form of cheating will result in severe penalties, which will include a score of zero for this exam and may resuit In a grade of F fer the course ard referral to the Dean of Students. All wireless devices must be securely put out of sight and may not be touched during the exam. Forces ZF = ma LF, = ma, ZF, = ma, Fis = Fi Asa f= HN Work and energy W = FArcosé W=AK =—myv? yp = — Sty Kr Equation sheet Linear variables 1 X= Xy +Vyoe+—at? 2 vy, tal vi =o + 2a(x-x,) Vag tT ¥ ac = Vac a= Ja ta? E=K+U E,=E, AE =AK+AU =0 Page 2 of 8 rad Circular variables tt =S AG av Ag 1 eh® av At a” = w, +2a(6+4,) o=@, tat 1 G=0,+ai¢+—at’ 2 vyoro a, 37°Q 2 Constants g= 9.8 mis? Page § of § red 5) 41.36 kg block sits at rest on an inclined plane that has an angle with the horizontal of 12.3 degrees. What is tha force of static friction? moon» N is a =z 6) Acrate of oranges weighing 182 N rests on a flatbed truck 2.83 m from the back of the truck. The coeificlents of friction between the crate and the bed are pg = 0.306 and Wy = 6.283. The truck drives on a straight level highway at a constant 8.72 m/s. What is the maximum acceleration the truck can have without tha crate starting to slide? 5.16 mis? 4.62 mis? . 7.25 mis? 9.64 mis? 3.00 mis? MoO D> Page 6 of 8red 7) Two blocks are connected by a light string passing over a pulley (as shown in the figure). The block with mass m, slides on a frictionless horizontal surface, while the block with mass m2 hangs vertically (m, > m,). The tension in the string is: moog> . Equal to mig Equal to mag Greater than mag but less than mig Less than meg Greater than mg 8) A trolley car in New Orleans starts from rest at the St. Charles Street stop and accelerates uniformly at 1.22 m/s2 for 12.7 s. How far has the train traveled at the end of the 12.7 s? MOOD 106m 72.3 m 91.5m 98.4 m 426m Page 7 of éred 9) A spider sits on a turntable that is rotating at a constant 33.3 rpm. The acceleration a of the spider Is A, Greater the closer the spider is to the central axis. B. Greater the farthar the spider Is from the central axis. C. Nenzere and independent of the location of the spider on the turntabie. D, Zora. (0) Consider a car at rest We can conclude that the downward gravitational pull of Earth on the car and the upward contact force of Earth on it are equal and opposite because: A. The two forces form an interaction (3" law) pair. B. The net force on the car is zero (2™ law), C. Neither of the above 11) Which of the fallowing situations are possible according ta Newton's laws? moo oF A hedy accelerates without exerting forces on any other bodies. A school bus drives along a straight road at constant speed under the action of a non-zero ret force. . (1 a collision between a large truck and a smail car, the force of the truck on tha car Is larger than the farce af the car on the truck. . When a car turns to the left, a centrifugal force in tha inertial frame is what pushes you to the right in your seat. . None of the above are possible.