PHYS124_SampleFinalExam.pdf - Physics 124 2017 Fall Term...

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PHYS124_SampleFinalExam.pdf

1 .   A projectile is launched with an initial velocity of ~ v = ( 5 . 2 ˆ x + 2 . 3 ˆ y ) m / s . What is the velocity of the projectile at the highest point on its trajectory ? Assume that gravity is oriented in the - y direction .
( a ) ~ v = 0 ( b ) ~ v = ( 5 . 2 ˆ x ) m / s ( c ) ~ v = 2 . 3 ˆ y m/s ( d ) ~ v = ( - 5 . 2 ˆ x - 2 . 3 ˆ y ) m / s ( e ) ~ v = ( 5 . 2 ˆ x - 2 . 3 ˆ y ) m / s
2 .   On the surface of Mars , an object of mass m A = m falls toward the ground with an acceleration of magnitude a A because of the force of gravity F A . If we consider a mass with m B = 2 m , what is the acceleration and force experienced by object B compared to object A ?
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3 .   Figure 1 below shows the positions of two cars as a function of time . At what time ( s ) will the cars have the same velocity ? Position ( km ) Car 1 Car 2 0.0 0.5 1.0 1.5 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Time ( min ) Figure 1 : Position vs. Time for two vehicles . Use this in Problem 3 . ( a ) 0.8 s ( b ) 1.0 s ( c ) 0.0 s ( d ) 0.2 s ( e ) 0.0 s and 1.0 s Did you write / bubble - in J = 9 , K = 9 , L = 9 in the SPECIAL CODES box on your answer sheet ? ( 3 pts ) 4 . If a tank of argon rests on the floor of an elevator moving upward at a constant speed , the normal force does positive work on the tank . Why does the kinetic energy of the tank of gas remain constant ?
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4 .   If a tank of argon rests on the floor of an elevator moving upward at a constant speed , the normal force does positive work on the tank . Why does the kinetic energy of the tank of gas remain constant ?
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Physics 1242017 Fall TermFinal ExaminationName:Student Number:Final Examination(200points)Read these instructions. Then follow them.Mobile phones are not allowed at any time during the exam, including trips to the washroom.Please do not open your test or begin your test until you are told to do so.BEFORE THE TEST BEGINS, you may remove the ScanTron sheet and being filling in the followinginformation.1. NAME in the format LASTNAMEFIRSTNAME2. STUDENT ID NUMBEREnter the seven digits (as on your student ID card) in the corresponding blank.3. TEST FORMThere are multiple versions of the exam. Your version will be indicated on the first page of theexam. Fill in the appropriate SPECIAL CODE on your exam sheet.Please leave your Student ID, formula sheet and your calculator out at all times so the invigilatorsmay check them. After they check them, you will be asked to sign an attendance sheet.This test is Multiple Choice and there are 50 questions. ReadALLanswers and select theONE BESTanswer. The questions have different point values: there are 25 questions each worth 3 points and 25questions worth 5 points.Bubble in your answers in HB pencil on the Scantron Answer Sheet. Answers written on this handoutwill NOT be marked, but you must turn in this handout along with your ScanTron sheet. There is noneed to show work.Any corrections and clarifications will announced during the exam.Don’t Panic.If you have a question or need extra paper, please raise your hand and an invigilator will come to you.Q: What’s a quantum physicist’s favourite exercise? A: Plancking!The examination will run from 9:00 a.m. to 12:00 noonYou may not leave the examination hall until 9:30 a.m. You must stop working immediately when thetest period is over at 12:00 noon. If you finish before 11:50 a.m., please turn in your exam materialsdirectly to your invigilator andquietlyleave the examination room. Otherwise, wait until the end ofthe test to pass your test handouts towards the central aisles so they may be collected by the invigilator.
PHYS124/A01: Final Form– Page 2 of 30 –Name:Answer Sheet Instructions: Failure to follow instructions will, alas, result in your answer sheetnot being scored.1. Fill in your Surname (Last name) and Given name (First name) in the boxes in your answersheet. Fill in the appropriate bubbles.2. Fill in your student ID number in the appropriate box on your answer sheet.Fill in thecorresponding bubbles.3.WriteJ= 9, K= 9, L= 9in the SPECIAL CODES box on your answer sheet.(3pts)1.A projectile is launched with an initial velocity of~v= (5.x+ 2.y)m/s. What is the velocity of theprojectile at the highest point on its trajectory? Assume that gravity is oriented in the-ydirection.

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